On 12 Jul 2012, Brian Candler wrote: > Oh OK, sorry. What's the underlying technology that the gluster brick is on? > Is it a plain old HD or HD RAID array - and does it have battery-backed > cache? Or is it something fancy like SSDs? Our Gluster test bricks are currently two identical Dell PE 2950's with PERC 6/i (LSI MegaRAID SAS 1078) controllers with battery backed cache and 4x 146GB 15k SAS drives in a hardware RAID-5 (I know, not ideal; but these machines are only being used temporarily as test machines). The Gluster volume is a simple mirror between the two machines. Our production machines, which are most likely going to be wiped of their DRBD/HA cluster/iSCSI stack and used with Gluster moving forward, are Dell PE R610's with the PERC H700 (newer LSI MegaRAID SAS 2108) with battery backed cache and 6x 600GB 10k SAS drives in a hardware RAID-10 (yay!). I'll be curious to see how much faster (if any) things are on the production grade machines. Our 1Gbps Ethernet connections are already approaching the limit anyway, so we'll probably need to move to 10Gbps Ethernet or 40Gbps Infiniband to realize a noticeable speed increase. -- Mark Nipper nipsy at bitgnome.net (XMPP) +1 979 575 3193 - "On two occasions I have been asked, ? 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' In one case a member of the Upper, and in the other a member of the Lower House put this question. I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question." -- Charles Babbage
