Re: Disable FS journaling

2014-05-20 Thread Kevin Burton
My gut says you won't see much of a performance boost. Especially if you're on SSD as the journal isn't going to be hindered by random write speed. Also, I *believe* you will lose filesystem metadata too… which Cassandra doesn't protect you from. On Tue, May 20, 2014 at 9:30 AM, Paulo Ricardo M

Re: Disable FS journaling

2014-05-20 Thread Paulo Ricardo Motta Gomes
On Tue, May 20, 2014 at 1:24 PM, Terje Marthinussen wrote: > Journal enabled is faster on almost all operations. > > Good to know, thanks! > Recovery here is more about saving you from waiting 1/2 hour from a > traditional full file system check. > > On an EC2 environment you normally lose the

Re: Disable FS journaling

2014-05-20 Thread Terje Marthinussen
Journal enabled is faster on almost all operations. Recovery here is more about saving you from waiting 1/2 hour from a traditional full file system check. Feel free to wait if you want though! :) Regards, Terje > On 21 May 2014, at 01:11, Paulo Ricardo Motta Gomes > wrote: > > Thanks for

Re: Disable FS journaling

2014-05-20 Thread Paulo Ricardo Motta Gomes
Thanks for the links! Forgot to mention, using XFS here, as suggested by the Cassandra wiki. But just double checked and it's apparently not possible to disable journaling on XFS. One of ours sysadmin just suggested disabling journaling, since it's mostly for recovery purposes, and Cassandra alre

Re: Disable FS journaling

2014-05-20 Thread Michael Shuler
On 05/20/2014 09:54 AM, Samir Faci wrote: I'm not sure you'd be gaining much by doing this. This is probably dependent on the file system you're referring to when you say journaling. There's a few of them around, You could opt to use ext2 instead of ext3/4 in the unix world. A quick google se

Re: Disable FS journaling

2014-05-20 Thread Samir Faci
I'm not sure you'd be gaining much by doing this. This is probably dependent on the file system you're referring to when you say journaling. There's a few of them around, You could opt to use ext2 instead of ext3/4 in the unix world. A quick google search linked me to this: http://blog.serverb

Disable FS journaling

2014-05-20 Thread Paulo Ricardo Motta Gomes
Hello, Has anyone disabled file system journaling on Cassandra nodes? Does it make any difference on write performance? Cheers, -- *Paulo Motta* Chaordic | *Platform* *www.chaordic.com.br * +55 48 3232.3200