Re: sstableloader question

2016-10-09 Thread Adam Hutson
It'll start over from the beginning. On Sunday, October 9, 2016, Osman YOZGATLIOGLU < osman.yozgatlio...@krontech.com> wrote: > Hello, > > I have running a sstableloader job. > Unfortunately some of nodes restarted since beginnig streaming. > I see streaming stop for those nodes. > Can I restart

sstableloader question

2016-10-09 Thread Osman YOZGATLIOGLU
Hello, I have running a sstableloader job. Unfortunately some of nodes restarted since beginnig streaming. I see streaming stop for those nodes. Can I restart those streaming somehow? Or if I restart sstableloader job, will it start from beginning? Regards, Osman This e-mail message, including

Re: JVM safepoints, mmap, and slow disks

2016-10-09 Thread Benedict Elliott Smith
Well, you seem to be assuming: 1) read ahead is done unconditionally, with an equal claim to disk resources 2) read ahead is actually enabled (tuning recommendations are that it be disabled, or at least drastically reduced, to my knowledge) 3) read ahead happens synchronously (even if you burn som

Re: JVM safepoints, mmap, and slow disks

2016-10-09 Thread Ariel Weisberg
Hi, Even with memory mapped IO the kernel is going to do read ahead. It seems like if the issue is reading to much from the device it isn't going to help to use memory mapped files or smaller buffered reads. Maybe helps by some percentage, but it's still going to read quite a bit extra. Arie

Re: JVM safepoints, mmap, and slow disks

2016-10-09 Thread Jeff Jirsa
Potentially relevant reading https://issues.apache.org/jira/browse/CASSANDRA-10249 From: Benedict Elliott Smith Reply-To: "user@cassandra.apache.org" Date: Sunday, October 9, 2016 at 2:39 AM To: "user@cassandra.apache.org" Subject: Re: JVM safepoints, mmap, and slow disks The biggest

Re: JVM safepoints, mmap, and slow disks

2016-10-09 Thread Benedict Elliott Smith
The biggest problem with pread was the issue of over reading (reading 64k where 4k would suffice), which was significantly improved in 2.2 iirc. I don't think the penalty is very significant anymore, and if you are experiencing time to safe point issues it's very likely a worthwhile switch to flip.

Re: Missing table suffix in data directory directories

2016-10-09 Thread Vladimir Yudovin
Probably those without suffix were created by previous Cassandra version (somewhere in 2.x series) Best regards, Vladimir Yudovin, Winguzone - Hosted Cloud Cassandra on Azure and SoftLayer. Launch your cluster in minutes. On Sun, 09 Oct 2016 01:58:07 -0400 Jason Kania