Re: Which RAID config for ES?

2014-09-25 Thread Nikolas Everett
On Thu, Sep 25, 2014 at 9:58 AM, John Smith java.dev@gmail.com wrote: So given the built in fault tolerance of Elasticsearch across the cluster are people adventurous enough to use RAID0? Absolutely. We only do it with pairs of disks though because RAID0 on any more then two disks just

Re: Which RAID config for ES?

2014-09-25 Thread joergpra...@gmail.com
If you want speed, use RAID 0. I have 4 cheap SSDs on one SAS-2 controller in RAID 0. Example for SSD http://core0.staticworld.net/images/article/2014/06/intel_ssd_raid-100315228-orig.png Jörg On Thu, Sep 25, 2014 at 4:01 PM, Nikolas Everett nik9...@gmail.com wrote: On Thu, Sep 25, 2014

Re: Which RAID config for ES?

2014-09-25 Thread John Smith
So all your machines just have 2 drives each? Isn't that expensive? On Thursday, 25 September 2014 10:01:42 UTC-4, Nikolas Everett wrote: On Thu, Sep 25, 2014 at 9:58 AM, John Smith java.d...@gmail.com javascript: wrote: So given the built in fault tolerance of Elasticsearch across the

Re: Which RAID config for ES?

2014-09-25 Thread John Smith
Not so much concerened about speed I know that RAID0 will give some performance boost. Just curious how tolerant an ES cluster is on RAID 0. On Thursday, 25 September 2014 10:12:10 UTC-4, Jörg Prante wrote: If you want speed, use RAID 0. I have 4 cheap SSDs on one SAS-2 controller in RAID

Re: Which RAID config for ES?

2014-09-25 Thread John Smith
Not so much concerned about the performance boost of RAID 0 but rather how fault tolerant is ES on RAID 0. On Thursday, 25 September 2014 10:12:10 UTC-4, Jörg Prante wrote: If you want speed, use RAID 0. I have 4 cheap SSDs on one SAS-2 controller in RAID 0. Example for SSD

Re: Which RAID config for ES?

2014-09-25 Thread John Smith
So assuming 2 node cluster. If you lose the array on one machine, you still have the other. I guess it comes down to what are the chances that multiple RAID0 arrays fail at the same time on the cluster On Thursday, 25 September 2014 13:47:13 UTC-4, John Smith wrote: Not so much concerned

Re: Which RAID config for ES?

2014-09-25 Thread joergpra...@gmail.com
If you have replica 1, more than one server is allowed to fail. SSDs, also enterprise versions (you can recognize them by the price tag), have erasing limits - enterprise SSD live longer. When they exceed the limit, they tend to die abruptly without warning. This is a bit different from spindle

Re: Which RAID config for ES?

2014-09-25 Thread Mark Walkom
Raid 0 , don't use 5 as the performance is sucky and ES is i/o intensive. Regards, Mark Walkom Infrastructure Engineer Campaign Monitor email: ma...@campaignmonitor.com web: www.campaignmonitor.com On 26 September 2014 06:01, joergpra...@gmail.com joergpra...@gmail.com wrote: If you have