Effective ownership on both nodes 0 %
Dear all
I have a Cassandra cluster with 2 nodes.
I was trying to increase the replication factor of keyspace in Cassandra to 2.
I did the following steps:
UPDATE KEYSPACE demo WITH strategy_options = {DC1:2,DC2:2}; on both the nodes
Then I ran the nodetool repair on both the nodes
Then I ran my Hector code to count the number of rows and columns in the
database.
I get the following error: Unavailable Exception
Also when I run the command
./nodetool -h ip_address ring
I found that both nodes ownership is 0 %. Please tell me how should I fix that.
Thanks and Regards
Prakrati
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Re: Cassandra Supports multi tenant or not
please refer following url, if you'd like to know about multi-tenancy with Cassandra. http://wiki.apache.org/cassandra/MultiTenant And, Hector supports multi tenant datamodel on cassandra. https://github.com/hector-client/hector/wiki/Virtual-Keyspaces Recently, I have disscussed about multi tenant datamodel on cassandra. please refere following archive. http://mail-archives.apache.org/mod_mbox/cassandra-user/201206.mbox/browser Toru. On Mon, 11 Jun 2012 14:45:32 +0900, MOHD ARSHAD SALEEM marshadsal...@tataelxsi.co.in wrote: Hi All, I wanted to know cassandra supports multi tenant features or not. if cassandra not supported multi tenant is there any other database which supports multi tenant . Regards Arshad -- --- SCSK Corp. Toru Inoko tel : 03-6438-3544 mail : in...@ms.scsk.jp ---
Re: Composite columns: CLI or CQL?
More details would help, like at least the query you're using to do the insertion and that fails, as well as the exact error message. -- Sylvain On Mon, Jun 11, 2012 at 2:42 AM, Georg Köster georg.koes...@gmail.com wrote: Dear all, I'm really excited about Cassandra's peer-to-peer architecture and sorted values. Currently I'm blocked in trials: I cannot insert longs into 'val' in: create columnfamily entries ( id varchar, va varchar, ts bigint, val bigint, PRIMARY KEY (id, va, ts) ); I get validation errors (String didn't validate). I can insert strings as much as I like. With int it seems to work, too. Did I make a mistake? The error is somewhat spurious, very seldomly it goes through, but I cannot really reproduce that situation. Another question is of course if I can switch validation off for the time it's still buggy? Since I don't get to trials: How fast is inserting a new column into the middle of a 100,000 columns row anyways? Cheers, Georg
Why cassandra nodes ownership is 0.00%
Dear all
I have a Cassandra cluster with 2 nodes. I am using NetworkTopologyStrategy.
I was trying to increase the replication factor of keyspace in Cassandra to 2.
I did the following steps:
UPDATE KEYSPACE demo WITH strategy_options = {DC1:2,DC2:2}; on both the nodes
Then I ran the nodetool repair on both the nodes
Then I ran my Hector code to count the number of rows and columns in the
database.
I get the following error: Unavailable Exception
Also when I run the command
./nodetool -h ip_address ring
I found that both nodes ownership is 0 %. Please tell me how should I fix that.
Thanks and Regards
Prakrati
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information. The information transmitted is intended only for the person(s) or
entities to which it is addressed. Any review, retransmission, dissemination or
other use of, or taking of any action in reliance upon, this information by
persons or entities other than the intended recipient is prohibited and may be
illegal. If you received this in error, please contact the sender and delete
the message from your system.
Mu Sigma takes all reasonable steps to ensure that its electronic
communications are free from viruses. However, given Internet accessibility,
the Company cannot accept liability for any virus introduced by this e-mail or
any attachment and you are advised to use up-to-date virus checking software.
Re: Composite columns: CLI or CQL?
I used Pelops and now I tried Astyanax and I get no details on the value that cassandra is analyzing - only the composite key is in the error message. If I insert a String instead of the Long (Long.toString(...) and Long.valueOf()) my tests work but my column size is larger of course. I can use it that way but I would rather find out what's wrong here. More details tonight - I can send a test case, too! Georg On Mon, Jun 11, 2012 at 9:14 AM, Sylvain Lebresne sylv...@datastax.comwrote: More details would help, like at least the query you're using to do the insertion and that fails, as well as the exact error message. -- Sylvain On Mon, Jun 11, 2012 at 2:42 AM, Georg Köster georg.koes...@gmail.com wrote: Dear all, I'm really excited about Cassandra's peer-to-peer architecture and sorted values. Currently I'm blocked in trials: I cannot insert longs into 'val' in: create columnfamily entries ( id varchar, va varchar, ts bigint, val bigint, PRIMARY KEY (id, va, ts) ); I get validation errors (String didn't validate). I can insert strings as much as I like. With int it seems to work, too. Did I make a mistake? The error is somewhat spurious, very seldomly it goes through, but I cannot really reproduce that situation. Another question is of course if I can switch validation off for the time it's still buggy? Since I don't get to trials: How fast is inserting a new column into the middle of a 100,000 columns row anyways? Cheers, Georg
Re: Commit log durability per column family
It's not possible and it's not possible to make the change. A write to the same key in multiple CF's is written as a single log record. So it's not possible for difference CF's to use different strategies. The closest thing is the durable_writes KS property which turns off the commit log for the KS. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 11/06/2012, at 7:28 AM, osishkin osishkin wrote: I require durability for inserts to my column families so I'm using batch mode to insert data. However, I have some column families which I use for less important data (indexes) which are much more write intensive. If I could change the commit log setting only for them to periodic instead of batch, it would improve performance for me, without losing too much guarantees. Is that even possible? I'm using Cassandra 0.7 (and yes, I know it's bad, I will upgrade soon) Thank you
Re: Effective ownership on both nodes 0 %
Also when I run the command
./nodetool –h ip_address ring
I found that both nodes ownership is 0 %. Please tell me how should I fix
that.
It would be a lot easier to answer you question if you showed the output from
nodetool ring.
UPDATE KEYSPACE demo WITH strategy_options = {DC1:2,DC2:2}; on both the nodes
This would only make sense if you had 2 data centres, with at least 2 nodes in
each.
You probably just want {DC1:2}
I get the following error: Unavailable Exception
This means there are not enough available nodes to perform the request at the
Consistency Level you code has requests. Probably due to the strategy_options
set above.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 11/06/2012, at 6:20 PM, Prakrati Agrawal wrote:
Dear all
I have a Cassandra cluster with 2 nodes.
I was trying to increase the replication factor of keyspace in Cassandra to
2. I did the following steps:
UPDATE KEYSPACE demo WITH strategy_options = {DC1:2,DC2:2}; on both the nodes
Then I ran the nodetool repair on both the nodes
Then I ran my Hector code to count the number of rows and columns in the
database.
I get the following error: Unavailable Exception
Also when I run the command
./nodetool –h ip_address ring
I found that both nodes ownership is 0 %. Please tell me how should I fix
that.
Thanks and Regards
Prakrati
This email message may contain proprietary, private and confidential
information. The information transmitted is intended only for the person(s)
or entities to which it is addressed. Any review, retransmission,
dissemination or other use of, or taking of any action in reliance upon, this
information by persons or entities other than the intended recipient is
prohibited and may be illegal. If you received this in error, please contact
the sender and delete the message from your system.
Mu Sigma takes all reasonable steps to ensure that its electronic
communications are free from viruses. However, given Internet accessibility,
the Company cannot accept liability for any virus introduced by this e-mail
or any attachment and you are advised to use up-to-date virus checking
software.
RE: how to configure cassandra as multi tenant
Hi Aaron, Can you send me some particular link related to multi tenant research Regards Arshad From: aaron morton [aa...@thelastpickle.com] Sent: Thursday, June 07, 2012 3:34 PM To: user@cassandra.apache.org Subject: Re: how to configure cassandra as multi tenant Cassandra is not designed to run as a multi tenant database. There have been some recent discussions on this, search the user group for more detailed answers. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 7/06/2012, at 7:03 PM, MOHD ARSHAD SALEEM wrote: Hi All, I wanted to know how to use cassandra as a multi tenant . Regards Arshad
Re: how to configure cassandra as multi tenant
Google, man. http://wiki.apache.org/cassandra/MultiTenant http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/about-multitenant-datamodel-td7575966.html http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/For-multi-tenant-is-it-good-to-have-a-key-space-for-each-tenant-td6723290.html On Mon, Jun 11, 2012 at 11:37 AM, MOHD ARSHAD SALEEM marshadsal...@tataelxsi.co.in wrote: Hi Aaron, Can you send me some particular link related to multi tenant research Regards Arshad -- *From:* aaron morton [aa...@thelastpickle.com] *Sent:* Thursday, June 07, 2012 3:34 PM *To:* user@cassandra.apache.org *Subject:* Re: how to configure cassandra as multi tenant Cassandra is not designed to run as a multi tenant database. There have been some recent discussions on this, search the user group for more detailed answers. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 7/06/2012, at 7:03 PM, MOHD ARSHAD SALEEM wrote: Hi All, I wanted to know how to use cassandra as a multi tenant . Regards Arshad -- Sasha Dolgy sasha.do...@gmail.com
RE: how to configure cassandra as multi tenant
Hi Sasha, Thanks for your reply. but what you send this is just to create keyspace manually using command prompt.how to create keyspace(Multi tenant) automatically using cassandra API's. Regards Arshad From: Sasha Dolgy [sdo...@gmail.com] Sent: Monday, June 11, 2012 3:09 PM To: user@cassandra.apache.org Subject: Re: how to configure cassandra as multi tenant Google, man. http://wiki.apache.org/cassandra/MultiTenant http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/about-multitenant-datamodel-td7575966.html http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/For-multi-tenant-is-it-good-to-have-a-key-space-for-each-tenant-td6723290.html On Mon, Jun 11, 2012 at 11:37 AM, MOHD ARSHAD SALEEM marshadsal...@tataelxsi.co.inmailto:marshadsal...@tataelxsi.co.in wrote: Hi Aaron, Can you send me some particular link related to multi tenant research Regards Arshad From: aaron morton [aa...@thelastpickle.commailto:aa...@thelastpickle.com] Sent: Thursday, June 07, 2012 3:34 PM To: user@cassandra.apache.orgmailto:user@cassandra.apache.org Subject: Re: how to configure cassandra as multi tenant Cassandra is not designed to run as a multi tenant database. There have been some recent discussions on this, search the user group for more detailed answers. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 7/06/2012, at 7:03 PM, MOHD ARSHAD SALEEM wrote: Hi All, I wanted to know how to use cassandra as a multi tenant . Regards Arshad -- Sasha Dolgy sasha.do...@gmail.commailto:sasha.do...@gmail.com
Re: Dead node still being pinged
Well, I don't see anything special in the logs. Remove token seems to have done its job : accorging to the logs, old stored hints have been deleted. If I were you, I would connect (through JMX, with jconsole) to one of the nodes that is sending messages to an old node, and would have a look at these MBean : - org.apache.net.FailureDetector : does SimpleStates looks good ? (or do you see an IP of an old node) - org.apache.net.MessagingService : do you see one of the old IP in one of the attributes ? - org.apache.net.StreamingService : do you see an old IP in StreamSources or StreamDestinations ? - org.apache.internal.HintedHandoff : are there non-zero ActiveCount, CurrentlyBlockedTasks, PendingTasks, TotalBlockedTask ? Samuel Nicolas Lalevée nicolas.lale...@hibnet.org 08/06/2012 21:03 Veuillez répondre à user@cassandra.apache.org A user@cassandra.apache.org cc Objet Re: Dead node still being pinged Le 8 juin 2012 à 20:02, Samuel CARRIERE a écrit : I'm in the train but just a guess : maybe it's hinted handoff. A look in the logs of the new nodes could confirm that : look for the IP of an old node and maybe you'll find hinted handoff related messages. I grepped on every node about every old node, I got nothing since the crash. If it can be of some help, here is some grepped log of the crash: system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,241 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,242 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,242 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,243 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,243 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: INFO [GossipStage:1] 2012-05-06 00:44:33,822 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [GossipStage:1] 2012-05-06 04:25:23,894 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [OptionalTasks:1] 2012-05-06 04:25:23,895 HintedHandOffManager.java (line 179) Deleting any stored hints for /10.10.0.24 system.log.1: INFO [GossipStage:1] 2012-05-06 04:25:23,895 StorageService.java (line 1157) Removing token 127605887595351923798765477786913079296 for /10.10.0.24 system.log.1: INFO [GossipStage:1] 2012-05-09 04:26:25,015 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. Maybe its the way I have removed nodes ? AFAIR I didn't used the decommission command. For each node I got the node down and then issue a remove token command. Here is what I can find in the log about when I removed one of them: system.log.1: INFO [GossipTasks:1] 2012-05-02 17:21:10,281 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [HintedHandoff:1] 2012-05-02 17:21:21,496 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [GossipStage:1] 2012-05-02 17:21:59,307 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [HintedHandoff:1] 2012-05-02 17:31:20,336 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [HintedHandoff:1] 2012-05-02 17:41:06,177 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [HintedHandoff:1] 2012-05-02 17:51:18,148 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [HintedHandoff:1] 2012-05-02 18:00:31,709 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [HintedHandoff:1] 2012-05-02 18:11:02,521 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [HintedHandoff:1] 2012-05-02 18:20:38,282 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [HintedHandoff:1] 2012-05-02 18:31:09,513 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [HintedHandoff:1] 2012-05-02 18:40:31,565 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [HintedHandoff:1] 2012-05-02 18:51:10,566
Hector code not running when replication factor set to 2
Dear all I had a 2 node cluster with replication factor set to 1. Then I changed the replication factor to 2 and brought down one node so that only 1 node was up and running. Then I ran my Hector code on the running node. But it gave me Unavailable Exception. I also had a Thrift code which ran successfully. I am confused as to why the Hector code did not run. Did I miss something? Please help me. Thanks and Regards Prakrati This email message may contain proprietary, private and confidential information. The information transmitted is intended only for the person(s) or entities to which it is addressed. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited and may be illegal. If you received this in error, please contact the sender and delete the message from your system. Mu Sigma takes all reasonable steps to ensure that its electronic communications are free from viruses. However, given Internet accessibility, the Company cannot accept liability for any virus introduced by this e-mail or any attachment and you are advised to use up-to-date virus checking software.
Re: how to configure cassandra as multi tenant
Arshad, I used google with the following query: apache cassandra multitenant Suggest you do the same? As was mentioned earlier, there has been a lot of discussion about this topic for the past year -- especially on this mailing list. If you want to use Thrift or, to make your life easier, using Hector or a similar API, you can create keyspaces however you want ... aligned to your design / architecture to support Multitenancy. If it's code specific help you want ... check out the maililng lists / resources for the various API's that make working with Thrift easier: Hector Pycassa PHPCassa etc. -sd On Mon, Jun 11, 2012 at 12:05 PM, MOHD ARSHAD SALEEM marshadsal...@tataelxsi.co.in wrote: Hi Sasha, Thanks for your reply. but what you send this is just to create keyspace manually using command prompt.how to create keyspace(Multi tenant) automatically using cassandra API's. Regards Arshad -- *From:* Sasha Dolgy [sdo...@gmail.com] *Sent:* Monday, June 11, 2012 3:09 PM *To:* user@cassandra.apache.org *Subject:* Re: how to configure cassandra as multi tenant Google, man. http://wiki.apache.org/cassandra/MultiTenant http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/about-multitenant-datamodel-td7575966.html http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/For-multi-tenant-is-it-good-to-have-a-key-space-for-each-tenant-td6723290.html On Mon, Jun 11, 2012 at 11:37 AM, MOHD ARSHAD SALEEM marshadsal...@tataelxsi.co.in wrote: Hi Aaron, Can you send me some particular link related to multi tenant research Regards Arshad -- *From:* aaron morton [aa...@thelastpickle.com] *Sent:* Thursday, June 07, 2012 3:34 PM *To:* user@cassandra.apache.org *Subject:* Re: how to configure cassandra as multi tenant Cassandra is not designed to run as a multi tenant database. There have been some recent discussions on this, search the user group for more detailed answers. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 7/06/2012, at 7:03 PM, MOHD ARSHAD SALEEM wrote: Hi All, I wanted to know how to use cassandra as a multi tenant . Regards Arshad -- Sasha Dolgy sasha.do...@gmail.com -- Sasha Dolgy sasha.do...@gmail.com
RE: how to configure cassandra as multi tenant
Hi Sasha, one more thing by using API's how to create keyspace and column family dynamically. write now i have to create first through the command prompt then that keyspace and column family used in API's. Regards Arshad From: Sasha Dolgy [sdo...@gmail.com] Sent: Monday, June 11, 2012 4:49 PM To: user@cassandra.apache.org Subject: Re: how to configure cassandra as multi tenant Arshad, I used google with the following query: apache cassandra multitenant Suggest you do the same? As was mentioned earlier, there has been a lot of discussion about this topic for the past year -- especially on this mailing list. If you want to use Thrift or, to make your life easier, using Hector or a similar API, you can create keyspaces however you want ... aligned to your design / architecture to support Multitenancy. If it's code specific help you want ... check out the maililng lists / resources for the various API's that make working with Thrift easier: Hector Pycassa PHPCassa etc. -sd On Mon, Jun 11, 2012 at 12:05 PM, MOHD ARSHAD SALEEM marshadsal...@tataelxsi.co.inmailto:marshadsal...@tataelxsi.co.in wrote: Hi Sasha, Thanks for your reply. but what you send this is just to create keyspace manually using command prompt.how to create keyspace(Multi tenant) automatically using cassandra API's. Regards Arshad From: Sasha Dolgy [sdo...@gmail.commailto:sdo...@gmail.com] Sent: Monday, June 11, 2012 3:09 PM To: user@cassandra.apache.orgmailto:user@cassandra.apache.org Subject: Re: how to configure cassandra as multi tenant Google, man. http://wiki.apache.org/cassandra/MultiTenant http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/about-multitenant-datamodel-td7575966.html http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/For-multi-tenant-is-it-good-to-have-a-key-space-for-each-tenant-td6723290.html On Mon, Jun 11, 2012 at 11:37 AM, MOHD ARSHAD SALEEM marshadsal...@tataelxsi.co.inmailto:marshadsal...@tataelxsi.co.in wrote: Hi Aaron, Can you send me some particular link related to multi tenant research Regards Arshad From: aaron morton [aa...@thelastpickle.commailto:aa...@thelastpickle.com] Sent: Thursday, June 07, 2012 3:34 PM To: user@cassandra.apache.orgmailto:user@cassandra.apache.org Subject: Re: how to configure cassandra as multi tenant Cassandra is not designed to run as a multi tenant database. There have been some recent discussions on this, search the user group for more detailed answers. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 7/06/2012, at 7:03 PM, MOHD ARSHAD SALEEM wrote: Hi All, I wanted to know how to use cassandra as a multi tenant . Regards Arshad -- Sasha Dolgy sasha.do...@gmail.commailto:sasha.do...@gmail.com -- Sasha Dolgy sasha.do...@gmail.commailto:sasha.do...@gmail.com
RE: Setting column to null
Thanks, I understand what you are telling me. Obviously deleting the column is the proper way to do this in Cassandra. What I was looking for, is some convenient wrapper on top of that which will do it for me. Here is my scenario. I have a function that takes a record to be saved in Cassandra (array of objects, or MapString, Object). Let say, it can have up to 8 columns. I prepare a statement like this: Insert into table values(?, ?, ?, ?, ?, ?, ?, ?) If I somehow could put null when I execute it, it would be enough to prepare that statement once and execute it multiple times. I would then expect that when some element is null, the corresponding column is not inserted (for the new key) or deleted (for the existing key). The way it is now, in my code I have to examine which columns are present and which are not, depending on that I have to generate customized statement, and it is going to be different for the case of existing key versus case of the new key. Isn't this too much hassle? Related question. I assumed that prepared statement in Cassandra is there for the same reason as in RDBMS, that is, for efficiency. In the above scenario, how expensive is it to execute specialized statement for every record compare to prepared statement executed multiple times? If I need to execute those specialized statements, should I still use prepared statement or should I just generate a string with everything in ascii format? -Original Message- From: Roshni Rajagopal [mailto:roshni.rajago...@wal-mart.com] Sent: Monday, June 11, 2012 12:58 AM To: user@cassandra.apache.org Subject: Re: Setting column to null Would you want to view data like this there was a key, which had this column , but now it does not have any value as of this time. Unless you specifically want this information, I believe you should just delete the column, rather than have an alternate value for NULL or create a composite column. Because in cassandra that’s the way deletion is dealt with, putting NULLs is the way we deal with it in RDBMS because we have a fixed number of columns which always have to have some value, even if its NULL, and we have to have the same set of columns for every row. In Cassandara, we can delete the column, and in most scenarios that’s what we should do, unless we specifically want to preserve some history that this column was turned null at this time…Each row can have different columns. Regards, Roshni From: Edward Capriolo edlinuxg...@gmail.commailto:edlinuxg...@gmail.com Reply-To: user@cassandra.apache.orgmailto:user@cassandra.apache.org user@cassandra.apache.orgmailto:user@cassandra.apache.org To: user@cassandra.apache.orgmailto:user@cassandra.apache.org user@cassandra.apache.orgmailto:user@cassandra.apache.org Subject: Re: Setting column to null Your best bet is to define the column as a composite column where one part represents is null and the other part is the data. On Friday, June 8, 2012, shashwat shriparv dwivedishash...@gmail.commailto:dwivedishash...@gmail.com wrote: What you can do is you can define some specific variable like NULLDATA some thing like that to update in columns that does have value On Fri, Jun 8, 2012 at 11:58 PM, aaron morton aa...@thelastpickle.commailto:aa...@thelastpickle.com wrote: You don't nee to set columns to null, delete the column instead. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 8/06/2012, at 9:34 AM, Leonid Ilyevsky wrote: Is it possible to explicitly set a column value to null? I see that if insert statement does not include a specific column, that column comes up as null (assuming we are creating a record with new unique key). But if we want to update a record, how we set it to null? Another situation is when I use prepared cql3 statement (in Java) and send parameters when I execute it. If I want to leave some column unassigned, I need a special statement without that column. What I would like is, prepare one statement including all columns, and then be able to set some of them to null. I tried to set corresponding ByteBuffer parameter to null, obviously got an exception. This email, along with any attachments, is confidential and may be legally privileged or otherwise protected from disclosure. Any unauthorized dissemination, copying or use of the contents of this email is strictly prohibited and may be in violation of law. If you are not the intended recipient, any disclosure, copying, forwarding or distribution of this email is strictly prohibited and this email and any attachments should be deleted immediately. This email and any attachments do not constitute an offer to sell or a solicitation of an offer to purchase any interest in any investment vehicle sponsored by Moon Capital Management LP (“Moon Capital”). Moon Capital does not provide legal, accounting or tax advice. Any
Re: Dead node still being pinged
Le 11 juin 2012 à 12:12, Samuel CARRIERE a écrit : Well, I don't see anything special in the logs. Remove token seems to have done its job : accorging to the logs, old stored hints have been deleted. If I were you, I would connect (through JMX, with jconsole) to one of the nodes that is sending messages to an old node, and would have a look at these MBean : - org.apache.net.FailureDetector : does SimpleStates looks good ? (or do you see an IP of an old node) - org.apache.net.MessagingService : do you see one of the old IP in one of the attributes ? - org.apache.net.StreamingService : do you see an old IP in StreamSources or StreamDestinations ? - org.apache.internal.HintedHandoff : are there non-zero ActiveCount, CurrentlyBlockedTasks, PendingTasks, TotalBlockedTask ? I feared I had too do such lookups... JMX sucks when there is some ssh tunneling to do. I'll get time to look into thoses. Thanks. By the way, maybe an interesting info (same on every node): root@data-5 ~ # nodetool -h data-local gossipinfo /10.10.0.27 LOAD:2.34205351889E11 SCHEMA:21099fc0-978c-11e1--bc70eee231ef RPC_ADDRESS:10.10.0.27 STATUS:NORMAL,113427455640312814857969558651062452224 RELEASE_VERSION:1.0.9 /10.10.0.26 LOAD:2.64617657147E11 SCHEMA:21099fc0-978c-11e1--bc70eee231ef RPC_ADDRESS:10.10.0.26 STATUS:NORMAL,56713727820156407428984779325531226112 RELEASE_VERSION:1.0.9 /10.10.0.25 LOAD:2.34154095981E11 SCHEMA:21099fc0-978c-11e1--bc70eee231ef RPC_ADDRESS:10.10.0.25 STATUS:NORMAL,0 RELEASE_VERSION:1.0.9 /10.10.0.24 STATUS:removed,127605887595351923798765477786913079296,1336530323263 REMOVAL_COORDINATOR:REMOVER,0 /10.10.0.22 STATUS:removed,42535295865117307932921825928971026432,1336529659203 REMOVAL_COORDINATOR:REMOVER,113427455640312814857969558651062452224 Nicolas Samuel Nicolas Lalevée nicolas.lale...@hibnet.org 08/06/2012 21:03 Veuillez répondre à user@cassandra.apache.org A user@cassandra.apache.org cc Objet Re: Dead node still being pinged Le 8 juin 2012 à 20:02, Samuel CARRIERE a écrit : I'm in the train but just a guess : maybe it's hinted handoff. A look in the logs of the new nodes could confirm that : look for the IP of an old node and maybe you'll find hinted handoff related messages. I grepped on every node about every old node, I got nothing since the crash. If it can be of some help, here is some grepped log of the crash: system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,241 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,242 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,242 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,243 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,243 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: INFO [GossipStage:1] 2012-05-06 00:44:33,822 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [GossipStage:1] 2012-05-06 04:25:23,894 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [OptionalTasks:1] 2012-05-06 04:25:23,895 HintedHandOffManager.java (line 179) Deleting any stored hints for /10.10.0.24 system.log.1: INFO [GossipStage:1] 2012-05-06 04:25:23,895 StorageService.java (line 1157) Removing token 127605887595351923798765477786913079296 for /10.10.0.24 system.log.1: INFO [GossipStage:1] 2012-05-09 04:26:25,015 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. Maybe its the way I have removed nodes ? AFAIR I didn't used the decommission command. For each node I got the node down and then issue a remove token command. Here is what I can find in the log about when I removed one of them: system.log.1: INFO [GossipTasks:1] 2012-05-02 17:21:10,281 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [HintedHandoff:1] 2012-05-02 17:21:21,496 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1: INFO [GossipStage:1] 2012-05-02 17:21:59,307 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [HintedHandoff:1] 2012-05-02 17:31:20,336 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died
Re: [RELEASE] Apache Cassandra 1.1.1 released
I think the change log for 1.1.1 is missing CASSANDRA-4150 [1]. -- Omid [1] https://issues.apache.org/jira/browse/CASSANDRA-4150 On Mon, Jun 4, 2012 at 9:52 PM, Sylvain Lebresne sylv...@datastax.com wrote: The Cassandra team is pleased to announce the release of Apache Cassandra version 1.1.1. Cassandra is a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model. You can read more here: http://cassandra.apache.org/ Downloads of source and binary distributions are listed in our download section: http://cassandra.apache.org/download/ This version is the first maintenance/bug fix release[1] on the 1.1 series. As always, please pay attention to the release notes[2] and Let us know[3] if you were to encounter any problem. Enjoy! [1]: http://goo.gl/4Dxae (CHANGES.txt) [2]: http://goo.gl/ZE8ZK (NEWS.txt) [3]: https://issues.apache.org/jira/browse/CASSANDRA
Re: Dead node still being pinged
finally, thanks to the groovy jmx builder, it was not that hard. Le 11 juin 2012 à 12:12, Samuel CARRIERE a écrit : If I were you, I would connect (through JMX, with jconsole) to one of the nodes that is sending messages to an old node, and would have a look at these MBean : - org.apache.net.FailureDetector : does SimpleStates looks good ? (or do you see an IP of an old node) SimpleStates:[/10.10.0.22:DOWN, /10.10.0.24:DOWN, /10.10.0.26:UP, /10.10.0.25:UP, /10.10.0.27:UP] - org.apache.net.MessagingService : do you see one of the old IP in one of the attributes ? data-5: CommandCompletedTasks: [10.10.0.22:2, 10.10.0.26:6147307, 10.10.0.27:6084684, 10.10.0.24:2] CommandPendingTasks: [10.10.0.22:0, 10.10.0.26:0, 10.10.0.27:0, 10.10.0.24:0] ResponseCompletedTasks: [10.10.0.22:1487, 10.10.0.26:6187204, 10.10.0.27:6062890, 10.10.0.24:1495] ResponsePendingTasks: [10.10.0.22:0, 10.10.0.26:0, 10.10.0.27:0, 10.10.0.24:0] data-6: CommandCompletedTasks: [10.10.0.22:2, 10.10.0.27:6064992, 10.10.0.24:2, 10.10.0.25:6308102] CommandPendingTasks: [10.10.0.22:0, 10.10.0.27:0, 10.10.0.24:0, 10.10.0.25:0] ResponseCompletedTasks: [10.10.0.22:1463, 10.10.0.27:6067943, 10.10.0.24:1474, 10.10.0.25:6367692] ResponsePendingTasks: [10.10.0.22:0, 10.10.0.27:0, 10.10.0.24:2, 10.10.0.25:0] data-7: CommandCompletedTasks: [10.10.0.22:2, 10.10.0.26:6043653, 10.10.0.24:2, 10.10.0.25:5964168] CommandPendingTasks: [10.10.0.22:0, 10.10.0.26:0, 10.10.0.24:0, 10.10.0.25:0] ResponseCompletedTasks: [10.10.0.22:1424, 10.10.0.26:6090251, 10.10.0.24:1431, 10.10.0.25:6094954] ResponsePendingTasks: [10.10.0.22:4, 10.10.0.26:0, 10.10.0.24:1, 10.10.0.25:0] - org.apache.net.StreamingService : do you see an old IP in StreamSources or StreamDestinations ? nothing streaming on the 3 nodes. nodetool netstats confirmed that. - org.apache.internal.HintedHandoff : are there non-zero ActiveCount, CurrentlyBlockedTasks, PendingTasks, TotalBlockedTask ? On the 3 nodes, all at 0. I don't know much what I'm looking at, but it seems that some ResponsePendingTasks needs to end. Nicolas Samuel Nicolas Lalevée nicolas.lale...@hibnet.org 08/06/2012 21:03 Veuillez répondre à user@cassandra.apache.org A user@cassandra.apache.org cc Objet Re: Dead node still being pinged Le 8 juin 2012 à 20:02, Samuel CARRIERE a écrit : I'm in the train but just a guess : maybe it's hinted handoff. A look in the logs of the new nodes could confirm that : look for the IP of an old node and maybe you'll find hinted handoff related messages. I grepped on every node about every old node, I got nothing since the crash. If it can be of some help, here is some grepped log of the crash: system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,241 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,242 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,242 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,243 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: WARN [RMI TCP Connection(1037)-10.10.0.26] 2012-05-06 00:39:30,243 StorageService.java (line 2417) Endpoint /10.10.0.24 is down and will not receive data for re-replication of /10.10.0.22 system.log.1: INFO [GossipStage:1] 2012-05-06 00:44:33,822 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [GossipStage:1] 2012-05-06 04:25:23,894 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [OptionalTasks:1] 2012-05-06 04:25:23,895 HintedHandOffManager.java (line 179) Deleting any stored hints for /10.10.0.24 system.log.1: INFO [GossipStage:1] 2012-05-06 04:25:23,895 StorageService.java (line 1157) Removing token 127605887595351923798765477786913079296 for /10.10.0.24 system.log.1: INFO [GossipStage:1] 2012-05-09 04:26:25,015 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. Maybe its the way I have removed nodes ? AFAIR I didn't used the decommission command. For each node I got the node down and then issue a remove token command. Here is what I can find in the log about when I removed one of them: system.log.1: INFO [GossipTasks:1] 2012-05-02 17:21:10,281 Gossiper.java (line 818) InetAddress /10.10.0.24 is now dead. system.log.1: INFO [HintedHandoff:1] 2012-05-02 17:21:21,496 HintedHandOffManager.java (line 292) Endpoint /10.10.0.24 died before hint delivery, aborting system.log.1:
Possible bug in Cassandra 1.1.1 with NTS
Just installed cassandra 1.1.1 and run:
root@carlo-laptop:/tmp# cassandra-cli -h localhost
Connected to: Test Cluster on localhost/9160
Welcome to Cassandra CLI version 1.1.1
Type 'help;' or '?' for help.
Type 'quit;' or 'exit;' to quit.
[default@unknown] create keyspace accounts
... with placement_strategy = 'NetworkTopologyStrategy'
... and strategy_options = {dc-test : 2}
... and durable_writes = true;
d05f1952-58a8-393b-b8b5-605ac8e434c4
Waiting for schema agreement...
... schemas agree across the cluster
[default@unknown]
[default@unknown] use accounts;
Authenticated to keyspace: accounts
[default@accounts]
[default@accounts] create column family Users
... with column_type = 'Standard'
... and comparator = 'BytesType'
... and default_validation_class = 'BytesType'
... and key_validation_class = 'TimeUUIDType';
a8943316-ee58-3160-a922-5826f15bd674
Waiting for schema agreement...
... schemas agree across the cluster
[default@accounts] list Users;
Using default limit of 100
Using default column limit of 100
null
UnavailableException()
at
org.apache.cassandra.thrift.Cassandra$get_range_slices_result.read(Cassandra.java:12346)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at
org.apache.cassandra.thrift.Cassandra$Client.recv_get_range_slices(Cassandra.java:692)
at
org.apache.cassandra.thrift.Cassandra$Client.get_range_slices(Cassandra.java:676)
at org.apache.cassandra.cli.CliClient.executeList(CliClient.java:1425)
at
org.apache.cassandra.cli.CliClient.executeCLIStatement(CliClient.java:273)
at
org.apache.cassandra.cli.CliMain.processStatementInteractive(CliMain.java:219)
at org.apache.cassandra.cli.CliMain.main(CliMain.java:346)
[default@accounts] root@carlo-laptop:/tmp#
root@carlo-laptop:/tmp# cat /etc/cassandra/cassandra-topology.properties
127.0.0.1:dc-test:my-notebook
root@carlo-laptop:/tmp#
I did not find anything relevant in JIRA. The setup is a single instance
cassandra in my notebook running the default cassandra 1.1.1 of debian repo.
--
Carlo Pires
Re: Possible bug in Cassandra 1.1.1 with NTS
The property file snitch isn't used by default. Did you change your
cassandra.yaml to use PropertyFileSnitch so it reads
cassandra-topology.properties?
Also the formatting in your dc property file isn't right. It should be
'ip=dc:rack'. So:
127.0.0.1=dc-test:my-notebook
On Mon, Jun 11, 2012 at 1:49 PM, Carlo Pires carlopi...@gmail.com wrote:
Just installed cassandra 1.1.1 and run:
root@carlo-laptop:/tmp# cassandra-cli -h localhost
Connected to: Test Cluster on localhost/9160
Welcome to Cassandra CLI version 1.1.1
Type 'help;' or '?' for help.
Type 'quit;' or 'exit;' to quit.
[default@unknown] create keyspace accounts
... with placement_strategy = 'NetworkTopologyStrategy'
... and strategy_options = {dc-test : 2}
... and durable_writes = true;
d05f1952-58a8-393b-b8b5-605ac8e434c4
Waiting for schema agreement...
... schemas agree across the cluster
[default@unknown]
[default@unknown] use accounts;
Authenticated to keyspace: accounts
[default@accounts]
[default@accounts] create column family Users
... with column_type = 'Standard'
... and comparator = 'BytesType'
... and default_validation_class = 'BytesType'
... and key_validation_class = 'TimeUUIDType';
a8943316-ee58-3160-a922-5826f15bd674
Waiting for schema agreement...
... schemas agree across the cluster
[default@accounts] list Users;
Using default limit of 100
Using default column limit of 100
null
UnavailableException()
at
org.apache.cassandra.thrift.Cassandra$get_range_slices_result.read(Cassandra.java:12346)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at
org.apache.cassandra.thrift.Cassandra$Client.recv_get_range_slices(Cassandra.java:692)
at
org.apache.cassandra.thrift.Cassandra$Client.get_range_slices(Cassandra.java:676)
at org.apache.cassandra.cli.CliClient.executeList(CliClient.java:1425)
at
org.apache.cassandra.cli.CliClient.executeCLIStatement(CliClient.java:273)
at
org.apache.cassandra.cli.CliMain.processStatementInteractive(CliMain.java:219)
at org.apache.cassandra.cli.CliMain.main(CliMain.java:346)
[default@accounts] root@carlo-laptop:/tmp#
root@carlo-laptop:/tmp# cat /etc/cassandra/cassandra-topology.properties
127.0.0.1:dc-test:my-notebook
root@carlo-laptop:/tmp#
I did not find anything relevant in JIRA. The setup is a single instance
cassandra in my notebook running the default cassandra 1.1.1 of debian repo.
--
Carlo Pires
Re: Possible bug in Cassandra 1.1.1 with NTS
I forgot to change cassandra.yaml to use PropertyFileSnitch AND
cassandra-topology syntax was incorrect. Thanks, Nick.
I don't know why I got no error in 1.0.8 with PropertyFileSnitch in
cassandra.yaml and wrong syntax in cassandra-topology.properties.
PS: I had to change JVM_OPTS in /etc/cassandra/cassandra-env.sh to use 160k
instead 128k. This has not been fixed?
My java is:
root@carlo-laptop:/tmp# java -version
java version 1.7.0_04
Java(TM) SE Runtime Environment (build 1.7.0_04-b20)
Java HotSpot(TM) 64-Bit Server VM (build 23.0-b21, mixed mode)
2012/6/11 Nick Bailey n...@datastax.com
The property file snitch isn't used by default. Did you change your
cassandra.yaml to use PropertyFileSnitch so it reads
cassandra-topology.properties?
Also the formatting in your dc property file isn't right. It should be
'ip=dc:rack'. So:
127.0.0.1=dc-test:my-notebook
On Mon, Jun 11, 2012 at 1:49 PM, Carlo Pires carlopi...@gmail.com wrote:
Just installed cassandra 1.1.1 and run:
root@carlo-laptop:/tmp# cassandra-cli -h localhost
Connected to: Test Cluster on localhost/9160
Welcome to Cassandra CLI version 1.1.1
Type 'help;' or '?' for help.
Type 'quit;' or 'exit;' to quit.
[default@unknown] create keyspace accounts
... with placement_strategy = 'NetworkTopologyStrategy'
... and strategy_options = {dc-test : 2}
... and durable_writes = true;
d05f1952-58a8-393b-b8b5-605ac8e434c4
Waiting for schema agreement...
... schemas agree across the cluster
[default@unknown]
[default@unknown] use accounts;
Authenticated to keyspace: accounts
[default@accounts]
[default@accounts] create column family Users
... with column_type = 'Standard'
... and comparator = 'BytesType'
... and default_validation_class = 'BytesType'
... and key_validation_class = 'TimeUUIDType';
a8943316-ee58-3160-a922-5826f15bd674
Waiting for schema agreement...
... schemas agree across the cluster
[default@accounts] list Users;
Using default limit of 100
Using default column limit of 100
null
UnavailableException()
at
org.apache.cassandra.thrift.Cassandra$get_range_slices_result.read(Cassandra.java:12346)
at
org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at
org.apache.cassandra.thrift.Cassandra$Client.recv_get_range_slices(Cassandra.java:692)
at
org.apache.cassandra.thrift.Cassandra$Client.get_range_slices(Cassandra.java:676)
at
org.apache.cassandra.cli.CliClient.executeList(CliClient.java:1425)
at
org.apache.cassandra.cli.CliClient.executeCLIStatement(CliClient.java:273)
at
org.apache.cassandra.cli.CliMain.processStatementInteractive(CliMain.java:219)
at org.apache.cassandra.cli.CliMain.main(CliMain.java:346)
[default@accounts] root@carlo-laptop:/tmp#
root@carlo-laptop:/tmp# cat /etc/cassandra/cassandra-topology.properties
127.0.0.1:dc-test:my-notebook
root@carlo-laptop:/tmp#
I did not find anything relevant in JIRA. The setup is a single instance
cassandra in my notebook running the default cassandra 1.1.1 of debian
repo.
--
Carlo Pires
--
Carlo Pires
62 8209-1444 TIM
62 3251-1383
Skype: carlopires
Re: Possible bug in Cassandra 1.1.1 with NTS
I don't know why I got no error in 1.0.8 with PropertyFileSnitch in cassandra.yaml and wrong syntax in cassandra-topology.properties. Not sure either. PS: I had to change JVM_OPTS in /etc/cassandra/cassandra-env.sh to use 160k instead 128k. This has not been fixed? Still marked as unresolved. https://issues.apache.org/jira/browse/CASSANDRA-4275
Re: Much more native memory used by Cassandra then the configured JVM heap size
Btw. I suggest you spin up JConsole as it will give you much more detai kon what your VM is actually doing. On Mon, Jun 11, 2012 at 9:14 PM, Jason Tang ares.t...@gmail.com wrote: Hi We have some problem with Cassandra memory usage, we configure the JVM HEAP 6G, but after runing Cassandra for several hours (insert, update, delete). The total memory used by Cassandra go up to 15G, which cause the OS low memory. So I wonder if it is normal to have so many memory used by cassandra? And how to limit the native memory used by Cassandra? === Cassandra 1.0.3, 64 bit jdk. Memory ocupied by Cassandra 15G PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 9567 casadm20 0 28.3g 15g 9.1g S 269 65.1 385:57.65 java = -Xms6G -Xmx6G -Xmn1600M # ps -ef | grep 9567 casadm9567 1 55 Jun11 ?05:59:44 /opt/jdk1.6.0_29/bin/java -ea -javaagent:/opt/dve/cassandra/bin/../lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms6G -Xmx6G -Xmn1600M -XX:+HeapDumpOnOutOfMemoryError -Xss128k -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=1 -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -Djava.net.preferIPv4Stack=true -Dcom.sun.management.jmxremote.port=6080 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Daccess.properties=/opt/dve/cassandra/conf/access.properties -Dpasswd.properties=/opt/dve/cassandra/conf/passwd.properties -Dpasswd.mode=MD5 -Dlog4j.configuration=log4j-server.properties -Dlog4j.defaultInitOverride=true -cp /opt/dve/cassandra/bin/../conf:/opt/dve/cassandra/bin/../build/classes/main:/opt/dve/cassandra/bin/../build/classes/thrift:/opt/dve/cassandra/bin/../lib/Cassandra-Extensions-1.0.0.jar:/opt/dve/cassandra/bin/../lib/antlr-3.2.jar:/opt/dve/cassandra/bin/../lib/apache-cassandra-1.0.3.jar:/opt/dve/cassandra/bin/../lib/apache-cassandra-clientutil-1.0.3.jar:/opt/dve/cassandra/bin/../lib/apache-cassandra-thrift-1.0.3.jar:/opt/dve/cassandra/bin/../lib/avro-1.4.0-fixes.jar:/opt/dve/cassandra/bin/../lib/avro-1.4.0-sources-fixes.jar:/opt/dve/cassandra/bin/../lib/commons-cli-1.1.jar:/opt/dve/cassandra/bin/../lib/commons-codec-1.2.jar:/opt/dve/cassandra/bin/../lib/commons-lang-2.4.jar:/opt/dve/cassandra/bin/../lib/compress-lzf-0.8.4.jar:/opt/dve/cassandra/bin/../lib/concurrentlinkedhashmap-lru-1.2.jar:/opt/dve/cassandra/bin/../lib/guava-r08.jar:/opt/dve/cassandra/bin/../lib/high-scale-lib-1.1.2.jar:/opt/dve/cassandra/bin/../lib/jackson-core-asl-1.4.0.jar:/opt/dve/cassandra/bin/../lib/jackson-mapper-asl-1.4.0.jar:/opt/dve/cassandra/bin/../lib/jamm-0.2.5.jar:/opt/dve/cassandra/bin/../lib/jline-0.9.94.jar:/opt/dve/cassandra/bin/../lib/json-simple-1.1.jar:/opt/dve/cassandra/bin/../lib/libthrift-0.6.jar:/opt/dve/cassandra/bin/../lib/log4j-1.2.16.jar:/opt/dve/cassandra/bin/../lib/servlet-api-2.5-20081211.jar:/opt/dve/cassandra/bin/../lib/slf4j-api-1.6.1.jar:/opt/dve/cassandra/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/dve/cassandra/bin/../lib/snakeyaml-1.6.jar:/opt/dve/cassandra/bin/../lib/snappy-java-1.0.4.1.jar org.apache.cassandra.thrift.CassandraDaemon == # nodetool -h 127.0.0.1 -p 6080 info Token: 85070591730234615865843651857942052864 Gossip active: true Load : 20.59 GB Generation No: 1339423322 Uptime (seconds) : 39626 Heap Memory (MB) : 3418.42 / 5984.00 Data Center : datacenter1 Rack : rack1 Exceptions : 0 = All row cache and key cache are disabled by default Key cache: disabled Row cache: disabled == # pmap 9567 9567: java START SIZE RSS PSS DIRTYSWAP PERM MAPPING 4000 36K 36K 36K 0K 0K r-xp /opt/jdk1.6.0_29/bin/java 40108000 8K 8K 8K 8K 0K rwxp /opt/jdk1.6.0_29/bin/java 4010a000 18040K 17988K 17988K 17988K 0K rwxp [heap] 00067ae0 6326700K 6258664K 6258664K 6258664K 0K rwxp [anon] 0007fd06b000 48724K 0K 0K 0K 0K rwxp [anon] 7fbed153 1331104K 0K 0K 0K 0K r-xs /var/cassandra/data/drc/queue-hb-219-Data.db 7fbf22918000 2097152K 0K 0K 0K 0K r-xs /var/cassandra/data/drc/queue-hb-219-Data.db 7fbfa2918000 2097148K 1124464K 1124462K 0K 0K r-xs /var/cassandra/data/drc/queue-hb-219-Data.db 7fc022917000 2097156K 2096496K 2096492K 0K 0K r-xs /var/cassandra/data/drc/queue-hb-219-Data.db 7fc0a2918000 2097148K 2097148K 2097146K 0K 0K r-xs /var/cassandra/data/drc/queue-hb-219-Data.db 7fc1a2917000 733584K 6444K 6444K 0K 0K r-xs /var/cassandra/data/drc/queue-hb-109-Data.db
Re: Much more native memory used by Cassandra then the configured JVM heap size
See my post, I limit the HVM heap 6G, but actually Cassandra will use more memory which is not calculated in JVM heap. I use top to monitor total memory used by Cassandra. = -Xms6G -Xmx6G -Xmn1600M 2012/6/12 Jeffrey Kesselman jef...@gmail.com Btw. I suggest you spin up JConsole as it will give you much more detai kon what your VM is actually doing. On Mon, Jun 11, 2012 at 9:14 PM, Jason Tang ares.t...@gmail.com wrote: Hi We have some problem with Cassandra memory usage, we configure the JVM HEAP 6G, but after runing Cassandra for several hours (insert, update, delete). The total memory used by Cassandra go up to 15G, which cause the OS low memory. So I wonder if it is normal to have so many memory used by cassandra? And how to limit the native memory used by Cassandra? === Cassandra 1.0.3, 64 bit jdk. Memory ocupied by Cassandra 15G PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 9567 casadm20 0 28.3g 15g 9.1g S 269 65.1 385:57.65 java = -Xms6G -Xmx6G -Xmn1600M # ps -ef | grep 9567 casadm9567 1 55 Jun11 ?05:59:44 /opt/jdk1.6.0_29/bin/java -ea -javaagent:/opt/dve/cassandra/bin/../lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms6G -Xmx6G -Xmn1600M -XX:+HeapDumpOnOutOfMemoryError -Xss128k -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=1 -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -Djava.net.preferIPv4Stack=true -Dcom.sun.management.jmxremote.port=6080 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Daccess.properties=/opt/dve/cassandra/conf/access.properties -Dpasswd.properties=/opt/dve/cassandra/conf/passwd.properties -Dpasswd.mode=MD5 -Dlog4j.configuration=log4j-server.properties -Dlog4j.defaultInitOverride=true -cp /opt/dve/cassandra/bin/../conf:/opt/dve/cassandra/bin/../build/classes/main:/opt/dve/cassandra/bin/../build/classes/thrift:/opt/dve/cassandra/bin/../lib/Cassandra-Extensions-1.0.0.jar:/opt/dve/cassandra/bin/../lib/antlr-3.2.jar:/opt/dve/cassandra/bin/../lib/apache-cassandra-1.0.3.jar:/opt/dve/cassandra/bin/../lib/apache-cassandra-clientutil-1.0.3.jar:/opt/dve/cassandra/bin/../lib/apache-cassandra-thrift-1.0.3.jar:/opt/dve/cassandra/bin/../lib/avro-1.4.0-fixes.jar:/opt/dve/cassandra/bin/../lib/avro-1.4.0-sources-fixes.jar:/opt/dve/cassandra/bin/../lib/commons-cli-1.1.jar:/opt/dve/cassandra/bin/../lib/commons-codec-1.2.jar:/opt/dve/cassandra/bin/../lib/commons-lang-2.4.jar:/opt/dve/cassandra/bin/../lib/compress-lzf-0.8.4.jar:/opt/dve/cassandra/bin/../lib/concurrentlinkedhashmap-lru-1.2.jar:/opt/dve/cassandra/bin/../lib/guava-r08.jar:/opt/dve/cassandra/bin/../lib/high-scale-lib-1.1.2.jar:/opt/dve/cassandra/bin/../lib/jackson-core-asl-1.4.0.jar:/opt/dve/cassandra/bin/../lib/jackson-mapper-asl-1.4.0.jar:/opt/dve/cassandra/bin/../lib/jamm-0.2.5.jar:/opt/dve/cassandra/bin/../lib/jline-0.9.94.jar:/opt/dve/cassandra/bin/../lib/json-simple-1.1.jar:/opt/dve/cassandra/bin/../lib/libthrift-0.6.jar:/opt/dve/cassandra/bin/../lib/log4j-1.2.16.jar:/opt/dve/cassandra/bin/../lib/servlet-api-2.5-20081211.jar:/opt/dve/cassandra/bin/../lib/slf4j-api-1.6.1.jar:/opt/dve/cassandra/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/dve/cassandra/bin/../lib/snakeyaml-1.6.jar:/opt/dve/cassandra/bin/../lib/snappy-java-1.0.4.1.jar org.apache.cassandra.thrift.CassandraDaemon == # nodetool -h 127.0.0.1 -p 6080 info Token: 85070591730234615865843651857942052864 Gossip active: true Load : 20.59 GB Generation No: 1339423322 Uptime (seconds) : 39626 Heap Memory (MB) : 3418.42 / 5984.00 Data Center : datacenter1 Rack : rack1 Exceptions : 0 = All row cache and key cache are disabled by default Key cache: disabled Row cache: disabled == # pmap 9567 9567: java START SIZE RSS PSS DIRTYSWAP PERM MAPPING 4000 36K 36K 36K 0K 0K r-xp /opt/jdk1.6.0_29/bin/java 40108000 8K 8K 8K 8K 0K rwxp /opt/jdk1.6.0_29/bin/java 4010a000 18040K 17988K 17988K 17988K 0K rwxp [heap] 00067ae0 6326700K 6258664K 6258664K 6258664K 0K rwxp [anon] 0007fd06b000 48724K 0K 0K 0K 0K rwxp [anon] 7fbed153 1331104K 0K 0K 0K 0K r-xs /var/cassandra/data/drc/queue-hb-219-Data.db 7fbf22918000 2097152K 0K 0K 0K 0K r-xs /var/cassandra/data/drc/queue-hb-219-Data.db 7fbfa2918000 2097148K 1124464K 1124462K 0K 0K r-xs /var/cassandra/data/drc/queue-hb-219-Data.db 7fc022917000 2097156K 2096496K 2096492K 0K 0K
Re: Offset in slicequeries for pagination
Hi Cyril, This may help. http://architecturalatrocities.com/post/13918146722/implementing-column-pagination-in-cassandra On Tue, Jun 12, 2012 at 3:18 AM, Cyril Auburtin cyril.aubur...@gmail.comwrote: If my columns are (k1:k2 = data1), (k11:k32 = data211), (k10:k211 = data91) U mean transforming to (1:k1:k2 = data1), (2:k11:k32 = data211) but I need the previous columns names to slice query on them 2012/6/11 R. Verlangen ro...@us2.nl I solved this with creating a manual index with as column keys integers and column values the uuid's of the results. Then run a slicequery to determine the batch to fetch. 2012/6/11 Cyril Auburtin cyril.aubur...@gmail.com using 10 results maximum per page, to go directly to 14th page, there is no offset=141 possibility I guess? or does a Java client proposes that? What is the best solution, perform a get with a limit = page*10, and then a get with a column_start equals the lastest column received, and a limit of 10, I guess also, client side should cache results but it's off topic -- With kind regards, Robin Verlangen *Software engineer* * * W http://www.robinverlangen.nl E ro...@us2.nl Disclaimer: The information contained in this message and attachments is intended solely for the attention and use of the named addressee and may be confidential. If you are not the intended recipient, you are reminded that the information remains the property of the sender. You must not use, disclose, distribute, copy, print or rely on this e-mail. If you have received this message in error, please contact the sender immediately and irrevocably delete this message and any copies. -- *Rajat Mathur B.Tech (IT) Final Year IIIT Allahabad 09945990291 Find me @ Facebook http://www.facebook.com/rajatmathurr Follow me @ Twitter http://www.twitter.com/Raj_Mathur*
Re: batch isolation
Row level deletion information is included in the row level isolation. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 5/06/2012, at 6:05 AM, Todd Burruss wrote: I don't think I'm being clear. I just was wondering if a row delete is isolated with all the other inserts or deletes to a specific column family and key in the same batch. On 6/4/12 1:58 AM, Sylvain Lebresne sylv...@datastax.com wrote: On Sun, Jun 3, 2012 at 6:05 PM, Todd Burruss bburr...@expedia.com wrote: I just meant there is a row delete in the same batch as inserts - all to the same column family and key Then it's the timestamp that will decide what happens. Whatever has a timestamp lower or equal to the tombstone timestamp will be deleted (that stands for insert in the batch itself). -- Sylvain -Original Message- From: Sylvain Lebresne [sylv...@datastax.com] Received: Sunday, 03 Jun 2012, 3:44am To: user@cassandra.apache.org [user@cassandra.apache.org] Subject: Re: batch isolation On Sun, Jun 3, 2012 at 2:53 AM, Todd Burruss bburr...@expedia.com wrote: 1 does this mean that a batch_mutate that first sends a row delete mutation on key X, then subsequent insert mutations for key X is isolated? I'm not sure what you mean by having a batch_mutate that first sends ... then ..., since a batch_mutate is a single API call. 2 does isolation span column families for the same key within the same batch_mutate? No, it doesn't span column families (contrarily to atomicity). There is more details in http://www.datastax.com/dev/blog/row-level-isolation. -- Sylvain
Re: how to configure cassandra as multi tenant
Check the documentation for you client or http://www.datastax.com/docs/1.0/dml/using_cql Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 11/06/2012, at 11:25 PM, MOHD ARSHAD SALEEM wrote: Hi Sasha, one more thing by using API's how to create keyspace and column family dynamically. write now i have to create first through the command prompt then that keyspace and column family used in API's. Regards Arshad From: Sasha Dolgy [sdo...@gmail.com] Sent: Monday, June 11, 2012 4:49 PM To: user@cassandra.apache.org Subject: Re: how to configure cassandra as multi tenant Arshad, I used google with the following query: apache cassandra multitenant Suggest you do the same? As was mentioned earlier, there has been a lot of discussion about this topic for the past year -- especially on this mailing list. If you want to use Thrift or, to make your life easier, using Hector or a similar API, you can create keyspaces however you want ... aligned to your design / architecture to support Multitenancy. If it's code specific help you want ... check out the maililng lists / resources for the various API's that make working with Thrift easier: Hector Pycassa PHPCassa etc. -sd On Mon, Jun 11, 2012 at 12:05 PM, MOHD ARSHAD SALEEM marshadsal...@tataelxsi.co.inwrote: Hi Sasha, Thanks for your reply. but what you send this is just to create keyspace manually using command prompt.how to create keyspace(Multi tenant) automatically using cassandra API's. Regards Arshad From: Sasha Dolgy [sdo...@gmail.com] Sent: Monday, June 11, 2012 3:09 PM To: user@cassandra.apache.org Subject: Re: how to configure cassandra as multi tenant Google, man. http://wiki.apache.org/cassandra/MultiTenant http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/about-multitenant-datamodel-td7575966.html http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/For-multi-tenant-is-it-good-to-have-a-key-space-for-each-tenant-td6723290.html On Mon, Jun 11, 2012 at 11:37 AM, MOHD ARSHAD SALEEM marshadsal...@tataelxsi.co.inwrote: Hi Aaron, Can you send me some particular link related to multi tenant research Regards Arshad From: aaron morton [aa...@thelastpickle.com] Sent: Thursday, June 07, 2012 3:34 PM To: user@cassandra.apache.org Subject: Re: how to configure cassandra as multi tenant Cassandra is not designed to run as a multi tenant database. There have been some recent discussions on this, search the user group for more detailed answers. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 7/06/2012, at 7:03 PM, MOHD ARSHAD SALEEM wrote: Hi All, I wanted to know how to use cassandra as a multi tenant . Regards Arshad -- Sasha Dolgy sasha.do...@gmail.com -- Sasha Dolgy sasha.do...@gmail.com
Re: Setting column to null
Leonid, Are you using some client for doing these operations..? Hector is a java client which provides APIs for adding/deleting columns to a column family in cassandra. I don¹t think you really need to write your wrapper in this format- you are restricting the number of columns it can use etc.I suggest your code can accept user input to get col family name, operation, keys , and operation, and accordingly call the appropriate hector API for adding/deleting data. Regards, Roshni On 11/06/12 7:20 PM, Leonid Ilyevsky lilyev...@mooncapital.com wrote: Thanks, I understand what you are telling me. Obviously deleting the column is the proper way to do this in Cassandra. What I was looking for, is some convenient wrapper on top of that which will do it for me. Here is my scenario. I have a function that takes a record to be saved in Cassandra (array of objects, or MapString, Object). Let say, it can have up to 8 columns. I prepare a statement like this: Insert into table values(?, ?, ?, ?, ?, ?, ?, ?) If I somehow could put null when I execute it, it would be enough to prepare that statement once and execute it multiple times. I would then expect that when some element is null, the corresponding column is not inserted (for the new key) or deleted (for the existing key). The way it is now, in my code I have to examine which columns are present and which are not, depending on that I have to generate customized statement, and it is going to be different for the case of existing key versus case of the new key. Isn't this too much hassle? Related question. I assumed that prepared statement in Cassandra is there for the same reason as in RDBMS, that is, for efficiency. In the above scenario, how expensive is it to execute specialized statement for every record compare to prepared statement executed multiple times? If I need to execute those specialized statements, should I still use prepared statement or should I just generate a string with everything in ascii format? -Original Message- From: Roshni Rajagopal [mailto:roshni.rajago...@wal-mart.com] Sent: Monday, June 11, 2012 12:58 AM To: user@cassandra.apache.org Subject: Re: Setting column to null Would you want to view data like this there was a key, which had this column , but now it does not have any value as of this time. Unless you specifically want this information, I believe you should just delete the column, rather than have an alternate value for NULL or create a composite column. Because in cassandra that¹s the way deletion is dealt with, putting NULLs is the way we deal with it in RDBMS because we have a fixed number of columns which always have to have some value, even if its NULL, and we have to have the same set of columns for every row. In Cassandara, we can delete the column, and in most scenarios that¹s what we should do, unless we specifically want to preserve some history that this column was turned null at this timeŠEach row can have different columns. Regards, Roshni From: Edward Capriolo edlinuxg...@gmail.commailto:edlinuxg...@gmail.com Reply-To: user@cassandra.apache.orgmailto:user@cassandra.apache.org user@cassandra.apache.orgmailto:user@cassandra.apache.org To: user@cassandra.apache.orgmailto:user@cassandra.apache.org user@cassandra.apache.orgmailto:user@cassandra.apache.org Subject: Re: Setting column to null Your best bet is to define the column as a composite column where one part represents is null and the other part is the data. On Friday, June 8, 2012, shashwat shriparv dwivedishash...@gmail.commailto:dwivedishash...@gmail.com wrote: What you can do is you can define some specific variable like NULLDATA some thing like that to update in columns that does have value On Fri, Jun 8, 2012 at 11:58 PM, aaron morton aa...@thelastpickle.commailto:aa...@thelastpickle.com wrote: You don't nee to set columns to null, delete the column instead. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 8/06/2012, at 9:34 AM, Leonid Ilyevsky wrote: Is it possible to explicitly set a column value to null? I see that if insert statement does not include a specific column, that column comes up as null (assuming we are creating a record with new unique key). But if we want to update a record, how we set it to null? Another situation is when I use prepared cql3 statement (in Java) and send parameters when I execute it. If I want to leave some column unassigned, I need a special statement without that column. What I would like is, prepare one statement including all columns, and then be able to set some of them to null. I tried to set corresponding ByteBuffer parameter to null, obviously got an exception. This email, along with any attachments, is confidential and may be legally privileged or otherwise protected from disclosure. Any unauthorized dissemination, copying or use of the contents of this email is strictly prohibited
Re: Much more native memory used by Cassandra then the configured JVM heap size
Hi I found some information of this issue And seems we can have other strategy for data access to reduce mmap usage, in order to use less memory. But I didn't find the document to describe the parameters for Cassandra 1.x, is it a good way to use this parameter to reduce shared memory usage and what's the impact? (btw, our data model is dynamical, which means the although the through put is high, but the life cycle of the data is short, one hour or less). # Choices are auto, standard, mmap, and mmap_index_only. disk_access_mode: auto http://comments.gmane.org/gmane.comp.db.cassandra.user/7390 2012/6/12 Jason Tang ares.t...@gmail.com See my post, I limit the HVM heap 6G, but actually Cassandra will use more memory which is not calculated in JVM heap. I use top to monitor total memory used by Cassandra. = -Xms6G -Xmx6G -Xmn1600M 2012/6/12 Jeffrey Kesselman jef...@gmail.com Btw. I suggest you spin up JConsole as it will give you much more detai kon what your VM is actually doing. On Mon, Jun 11, 2012 at 9:14 PM, Jason Tang ares.t...@gmail.com wrote: Hi We have some problem with Cassandra memory usage, we configure the JVM HEAP 6G, but after runing Cassandra for several hours (insert, update, delete). The total memory used by Cassandra go up to 15G, which cause the OS low memory. So I wonder if it is normal to have so many memory used by cassandra? And how to limit the native memory used by Cassandra? === Cassandra 1.0.3, 64 bit jdk. Memory ocupied by Cassandra 15G PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 9567 casadm20 0 28.3g 15g 9.1g S 269 65.1 385:57.65 java = -Xms6G -Xmx6G -Xmn1600M # ps -ef | grep 9567 casadm9567 1 55 Jun11 ?05:59:44 /opt/jdk1.6.0_29/bin/java -ea -javaagent:/opt/dve/cassandra/bin/../lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms6G -Xmx6G -Xmn1600M -XX:+HeapDumpOnOutOfMemoryError -Xss128k -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=1 -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -Djava.net.preferIPv4Stack=true -Dcom.sun.management.jmxremote.port=6080 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Daccess.properties=/opt/dve/cassandra/conf/access.properties -Dpasswd.properties=/opt/dve/cassandra/conf/passwd.properties -Dpasswd.mode=MD5 -Dlog4j.configuration=log4j-server.properties -Dlog4j.defaultInitOverride=true -cp /opt/dve/cassandra/bin/../conf:/opt/dve/cassandra/bin/../build/classes/main:/opt/dve/cassandra/bin/../build/classes/thrift:/opt/dve/cassandra/bin/../lib/Cassandra-Extensions-1.0.0.jar:/opt/dve/cassandra/bin/../lib/antlr-3.2.jar:/opt/dve/cassandra/bin/../lib/apache-cassandra-1.0.3.jar:/opt/dve/cassandra/bin/../lib/apache-cassandra-clientutil-1.0.3.jar:/opt/dve/cassandra/bin/../lib/apache-cassandra-thrift-1.0.3.jar:/opt/dve/cassandra/bin/../lib/avro-1.4.0-fixes.jar:/opt/dve/cassandra/bin/../lib/avro-1.4.0-sources-fixes.jar:/opt/dve/cassandra/bin/../lib/commons-cli-1.1.jar:/opt/dve/cassandra/bin/../lib/commons-codec-1.2.jar:/opt/dve/cassandra/bin/../lib/commons-lang-2.4.jar:/opt/dve/cassandra/bin/../lib/compress-lzf-0.8.4.jar:/opt/dve/cassandra/bin/../lib/concurrentlinkedhashmap-lru-1.2.jar:/opt/dve/cassandra/bin/../lib/guava-r08.jar:/opt/dve/cassandra/bin/../lib/high-scale-lib-1.1.2.jar:/opt/dve/cassandra/bin/../lib/jackson-core-asl-1.4.0.jar:/opt/dve/cassandra/bin/../lib/jackson-mapper-asl-1.4.0.jar:/opt/dve/cassandra/bin/../lib/jamm-0.2.5.jar:/opt/dve/cassandra/bin/../lib/jline-0.9.94.jar:/opt/dve/cassandra/bin/../lib/json-simple-1.1.jar:/opt/dve/cassandra/bin/../lib/libthrift-0.6.jar:/opt/dve/cassandra/bin/../lib/log4j-1.2.16.jar:/opt/dve/cassandra/bin/../lib/servlet-api-2.5-20081211.jar:/opt/dve/cassandra/bin/../lib/slf4j-api-1.6.1.jar:/opt/dve/cassandra/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/dve/cassandra/bin/../lib/snakeyaml-1.6.jar:/opt/dve/cassandra/bin/../lib/snappy-java-1.0.4.1.jar org.apache.cassandra.thrift.CassandraDaemon == # nodetool -h 127.0.0.1 -p 6080 info Token: 85070591730234615865843651857942052864 Gossip active: true Load : 20.59 GB Generation No: 1339423322 Uptime (seconds) : 39626 Heap Memory (MB) : 3418.42 / 5984.00 Data Center : datacenter1 Rack : rack1 Exceptions : 0 = All row cache and key cache are disabled by default Key cache: disabled Row cache: disabled == # pmap 9567 9567: java START SIZE RSS PSS DIRTYSWAP PERM MAPPING 4000 36K 36K 36K 0K 0K r-xp /opt/jdk1.6.0_29/bin/java 40108000 8K 8K 8K
