Re: [ceph-users] CentOS 7 iscsi gateway using lrbd

.pdf I'm trying to configure active/passive iSCSI gateway on OSD nodes serving RBD image. Clustering is done using pacemaker/corosync. Does anyone have a similar working setup? Anything I should be aware of? Thanks Dominik On Mon, Jan 18, 2016 at 11:35 AM, Dominik Zalewski <dzalew...@optlink

[ceph-users] CentOS 7 iscsi gateway using lrbd

Hi, I'm looking into implementing iscsi gateway with MPIO using lrbd - https://github.com/swiftgist/lrb https://www.suse.com/docrep/documents/kgu61iyowz/suse_enterprise_storage_2_and_iscsi.pdf https://www.susecon.com/doc/2015/sessions/TUT16512.pdf >From above examples: *For iSCSI failover

[ceph-users] Cache tier best practices

Hi, I would like to hear from people who use cache tier in Ceph about best practices and things I should avoid. I remember hearing that it wasn't that stable back then. Has it changed in Hammer release? Any tips and tricks are much appreciated! Thanks Dominik

Re: [ceph-users] Ceph Design

in the same time due to writes happening on both of them. You only going to get journal write performance penalty with RAID-1. Dominik On Wed, Aug 5, 2015 at 3:37 PM, Dominik Zalewski dzalew...@optlink.co.uk wrote: I would suggest splitting OSDs across two or more SSD journals (depending

Re: [ceph-users] Ceph Design

= 1 On Wed, Aug 5, 2015 at 4:48 PM, Dominik Zalewski dzalew...@optlink.co.uk wrote: Yes, there should a separate partition per OSD. You are probably looking at 10-20GB journal partition per OSD. If you are creating your cluster using ceph-deploy it can create journal partitions for you

Re: [ceph-users] any recommendation of using EnhanceIO?

Hi, I’ve asked same question last weeks or so (just search the mailing list archives for EnhanceIO :) and got some interesting answers. Looks like the project is pretty much dead since it was bought out by HGST. Even their website has some broken links in regards to EnhanceIO I’m keen to try

[ceph-users] NVME SSD for journal

Hi, I'm wondering if anyone is using NVME SSDs for journals? Intel 750 series 400GB NVME SSD offers good performance and price in comparison to let say Intel S3700 400GB. http://ark.intel.com/compare/71915,86740 My concern would be MTBF / TBW which is only 1.2M hours and 70GB per day for 5yrs

Re: [ceph-users] any recommendation of using EnhanceIO?

Hi, I’ve asked same question last weeks or so (just search the mailing list archives for EnhanceIO :) and got some interesting answers. Looks like the project is pretty much dead since it was bought out by HGST. Even their website has some broken links in regards to EnhanceIO I’m keen to try

[ceph-users] Ceph and EnhanceIO cache

Hi, I came across this blog post mentioning using EnhanceIO (fork of flashcache) as cache for OSDs. http://www.sebastien-han.fr/blog/2014/10/06/ceph-and-enhanceio/ https://github.com/stec-inc/EnhanceIO I'm planning to test it with 5x 1TB HGST Travelstar 7k1000 2.5inch OSDs and using 256GB

Re: [ceph-users] Ceph and EnhanceIO cache

year. Dominik On Fri, Jun 26, 2015 at 10:28 AM, Nick Fisk n...@fisk.me.uk wrote: -Original Message- From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Dominik Zalewski Sent: 26 June 2015 09:59 To: ceph-users@lists.ceph.com Subject: [ceph-users] Ceph

[ceph-users] Best setup for SSD

Be warned that running SSD and HD based OSDs in the same server is not recommended. If you need the storage capacity, I'd stick to the journals on SSDs plan. Can you please elaborate more why running SSD and HD based OSDs in the same server is not recommended ? Thanks Dominik