RE: Cassandra on Windows network latency

on Windows network latency I learned the hard way, that running py_stress in the src/contrib directory is a great way to test what kind of speeds you are really getting. What tools / client are you using to test to get the 200ms number? stu On Thu, Apr 29, 2010 at 7:12 AM, Viktor Jevdokimov

RE: Cassandra on Windows network latency

TbufferedTransport instead. Carlos On 4/29/10, Viktor Jevdokimov viktor.jevdoki...@adform.com wrote: Thrift C# sources, thrift generated Cassandra sources, test app built with C#. Simple connect/write/read operations. No pooling or anything else. From: Heath Oderman [mailto:he

Primary and Backup clusters

Hello, Our system (not Cassandra) have backup cluster in different datacenter in case of primary cluster unavailability or for software upgrades. 100% of traffic goes to primary cluster. We switch 100% traffic to backup cluster in case above for a short time, then when issues are resolved,

RE: Extremly slow inserts on LAN

We had similar experience. Problem was with TSocket as transport alone: var transport = new TSocket(192.168.0.123, 9160); var protocol = new TBinaryProtocol(transport); var client = new Cassandra.Client(protocol); Using TBufferedTransport helped a lot: var

RE: Running Cassandra as a Windows Service

needed to write a simple WindowsService class. In addition to the procrun executables for 32/64 bit platforms and a batch file to install and remove the service, I'll also be including an ant build file and associated unit tests. Todd From: Viktor Jevdokimov

Cache capacity set with JConsole is lost after restart

Hi, We're not setting cache capacity upon creation of Column Family, since the type and capacity is unknown at that time. By default it = 0. After Column Family has enough data and we could decide on cache type (Row or Key) and capacity, we connect with JConsole and set cache capacity manually

RE: Cache capacity set with JConsole is lost after restart

, Viktor Jevdokimov viktor.jevdoki...@adform.com wrote: Hi, We're not setting cache capacity upon creation of Column Family, since the type and capacity is unknown at that time. By default it = 0. After Column Family has enough data and we could decide on cache type (Row or Key) and capacity

RE: Cassandra 0.7 logging

We found that on Windows only log4j.properties is working for logging, not log4-server.properties -Original Message- From: Alaa Zubaidi [mailto:alaa.zuba...@pdf.com] Sent: Wednesday, September 08, 2010 7:34 AM To: user@cassandra.apache.org Subject: Re: Cassandra 0.7 logging I did

RE: 0.7 live schema updates

But you'll loose these settings after Cassandra restart. -Original Message- From: Oleg Anastasyev [mailto:olega...@gmail.com] Sent: Thursday, September 16, 2010 11:21 AM To: user@cassandra.apache.org Subject: Re: 0.7 live schema updates You can change these attrs using JMX interface.

RE: compaction throughput rate not even close to 16MB

. supercolumns with one column (columns from model 1 merged to one blob value) We found that model 2 compaction performs 4 times faster. The same for regular column families. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.com Phone: +370 5 212

RE: Cassandra Experts

Consulting company is a body shop that looking for a job candidates for their clients, shortly - recruiters, so not interested in support or learning, just selling bodies with some brains. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki

RE: (unofficial) Community Poll for Production Operators : Repair

of the cluster without real value. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.com Phone: +370 5 212 3063 Fax: +370 5 261 0453 J. Jasinskio 16C, LT-01112 Vilnius, Lithuania Disclaimer: The information contained in this message and attachments

RE: consistency level for create keyspace?

of the map is 1. */ mapstring, liststring describe_schema_versions() throws (1: InvalidRequestException ire), Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.com Phone: +370 5 212 3063 Fax: +370 5 261 0453 J. Jasinskio 16C, LT-01112

RE: What is the effect of reducing the thrift message sizes on GC

to be copied from young to old space. So reads and compactions will not promote objects to old space (short living objects) and you can see that increased reads and compactions during the same write load will increase GC frequency but decrease GC pause time. Best regards / Pagarbiai Viktor

RE: Error during startup - java.lang.OutOfMemoryError: unable to create new native thread

For start: - check (cassandra-env.sh) -Xss size, you may need to increase it for your JVM; - check (cassandra-env.sh) -Xms and -Xmx size, you may need to increase it for your data load/bloom filter/index sizes. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer [Adform News] http

RE: Problems in the cassandra bulk loader

, not usage/your code development around Cassandra. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.com Phone: +370 5 212 3063 Fax: +370 5 261 0453 J. Jasinskio 16C, LT-03163 Vilnius, Lithuania Disclaimer: The information contained in this message

RE: Problems in the cassandra bulk loader

Cassandra does not expect more rows with the same key in sstable. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.commailto:viktor.jevdoki...@adform.com Phone: +370 5 212 3063, Fax +370 5 261 0453 J. Jasinskio 16C, LT-03163 Vilnius, Lithuania Follow us

RE: Sorting keys for batch reads to minimize seeks

are added or removed from the cluster Just be aware, get token ranges from Cassandra. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.com Phone: +370 5 212 3063 Fax: +370 5 261 0453 J. Jasinskio 16C, LT-03163 Vilnius, Lithuania Disclaimer

RE: Sorting keys for batch reads to minimize seeks

/13 08:31, Viktor Jevdokimov wrote: The only thing you may win - avoid unnecessary network hops if: - request sorted keys (by token) from appropriate replica with ConsistencyLevel.ONE and dynamic_snitch: false. - nodes has the same load - replica not doing GC, and GC pauses are much higher than

RE: Cassandra mad GC

Simply don't use G1 GC, it will not be better on Cassandra than CMS, it could be worse. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.com Phone: +370 5 212 3063 Fax: +370 5 261 0453 J. Jasinskio 16C, LT-03163 Vilnius, Lithuania Disclaimer

RE: Cassandra mad GC

Forgot to ask, what do you want to achieve by changing default GC settings? -Original Message- From: Viktor Jevdokimov [mailto:viktor.jevdoki...@adform.com] Sent: Wednesday, January 15, 2014 10:18 AM To: user@cassandra.apache.org Subject: RE: Cassandra mad GC Simply don't use G1 GC

RE: Upserting the same values multiple times

columns. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.commailto:viktor.jevdoki...@adform.com Phone: +370 5 212 3063, Fax +370 5 261 0453 J. Jasinskio 16C, LT-03163 Vilnius, Lithuania Follow us on Twitter: @adforminsiderhttp://twitter.com/#!/adforminsider

RE: Exporting column family data to csv

http://mail-archives.apache.org/mod_mbox/cassandra-user/201309.mbox/%3C9AF3ADEDDFED4DDEA840B8F5C6286BBA@vig.local%3E http://stackoverflow.com/questions/18872422/rpc-timeout-error-while-exporting-data-from-cql Google for more. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email

RE: Is the updating compaction strategy from 'sized tiered' to 'leveled' automatic or need to be done manually?

To trigger LCS you need to write to this CF and wait when new sstable flushes. I can’t find any other way to start LCS. Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.commailto:viktor.jevdoki...@adform.com Phone: +370 5 212 3063, Fax +370 5 261 0453

RE: Is the updating compaction strategy from 'sized tiered' to 'leveled' automatic or need to be done manually? [heur]

Subject: Re: Is the updating compaction strategy from 'sized tiered' to 'leveled' automatic or need to be done manually? [heur] What you mean 'you need write to this CF'? I've changed the schema by using CQL3 'alter table' statments. On Mon, May 5, 2014 at 2:28 PM, Viktor Jevdokimov

RE: Is the updating compaction strategy from 'sized tiered' to 'leveled' automatic or need to be done manually? [heur]

Enough to write 1 column and run nodetool flush. From: Viktor Jevdokimov [mailto:viktor.jevdoki...@adform.com] Sent: Tuesday, May 6, 2014 12:00 PM To: user@cassandra.apache.org Subject: RE: Is the updating compaction strategy from 'sized tiered' to 'leveled' automatic or need to be done manually

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