Re: Snapshot SSTable modified??

Unix timestamps are a bit odd. "mtime/Modify" is file changes, "ctime/Change/(sometimes called create)" is file metadata changes, and a link count change is a metadata change. This seems like an odd decision on the part of GNU tar, but presumably there's a good reason for it. When the original

Re: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage

> > 1) nodetool is reusing the $MAX_HEAP_SIZE environment variable, thus if we > are running Cassandra with e.g. Xmx31G, nodetool is started with Xmx31G as > well This was fixed in 3.0.11/3.10 in CASSANDRA-12739 . Not sure why it didn't make

Re: Certified Cassandra for Enterprise use

datastax From: Pranay akula Reply-To: "user@cassandra.apache.org" Date: Monday, May 28, 2018 at 5:12 PM To: "user@cassandra.apache.org" Subject: Certified Cassandra for Enterprise use Is there any third party who provides security patches/releases for Apache cassandra For Enterprise use is

Certified Cassandra for Enterprise use

Is there any third party who provides security patches/releases for Apache cassandra For Enterprise use is there any third party who provides certified Apache cassandra packages ?? Thanks Pranay

nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage

Hello, on a quite capable machine with 32 physical cores (64 vCPUs) we see sporadic CPU usage up to 50% caused by nodetool on this box, thus digged a bit further. A few observations: 1) nodetool is reusing the $MAX_HEAP_SIZE environment variable, thus if we are running Cassandra with e.g.

Re: cassandra concurrent read performance problem

Hi, Would you share some more context with us? - What Cassandra version do you use? - What is the data size per node? - How much RAM does the hardware have? - Does your client use paging? A few ideas to explore: - Try tracing the query, see what's taking time (and resources) - From the

Re: Log application Queries

Hello, Another way to do it would be to create your own QueryHandler: * create a class that would implement the QueryHandler interface and make Cassandra aware of it * in that class you can maintain a list of the queries (add to this list when prepare method is being called) and the

答复: 答复: Re: cassandra update vs insert + delete

It is not possible to update the primary key. Best Regards, 倪项菲/ David Ni 中移德电网络科技有限公司 Virtue Intelligent Network Ltd, co. Add: 2003,20F No.35 Luojia creative city,Luoyu Road,Wuhan,HuBei Mob: +86 13797007811|Tel: + 86 27 5024 2516 发件人: onmstester onmstester 发送时间:

Fwd: 答复: Re: cassandra update vs insert + delete

It seems that i can't update a part of primary key in cqlsh update: message "PRIMARY Key part column found in SET part" Sent using Zoho Mail Forwarded message >From : Xiangfei Ni xiangfei...@cm-dt.com To : "user@cassandra.apache.org"user@cassandra.apache.org

答复: Re: cassandra update vs insert + delete

Yes, you are correct. Best Regards, 倪项菲/ David Ni 中移德电网络科技有限公司 Virtue Intelligent Network Ltd, co. Add: 2003,20F No.35 Luojia creative city,Luoyu Road,Wuhan,HuBei Mob: +86 13797007811|Tel: + 86 27 5024 2516 发件人: onmstester onmstester 发送时间: 2018年5月28日 14:33 收件人: user

Fwd: Re: cassandra update vs insert + delete

How update is working underneath? Does it create a new row (because i'm changing a column of partition key) and add a tombstone to the old row? Sent using Zoho Mail Forwarded message >From : Jonathan Haddad j...@jonhaddad.com To : user@cassandra.apache.org