Hi All, Can anyone shed some light on / if L2ARC support will be included in the next Solaris 10 update? Or if it is included in a Kernel patch over and above the standard Kernel patch rev that ships in 05/09 (AKA U7)? The reason I ask is that I have standardised on S10 here and am not keen to deploy OpenSolaris in production. (Just another platform and patching system to document and maintain. I don''t want to debate this here. It''s the way it is.) I am currently speccing some x4240''s with SSD''s for some upgraded Squid proxy cache''s that will be handling caching duties for around 40 - 60 megabit''s / s. Large disk caches and L1ARC for squid will make these systems really fly. (These are replacing tow v240''s that are getting a little long in the tooth and want keep up with the bandwidth jump) The plan is to have a couple of x4240''s with Dual quad core processors, 16 GB RAM and 6 x 146 GB 10K SAS drives plus 1 x 32 GB SSD as L2ARC. I can add this later if support for this not available at build time, but is road mapped for S8? ZFS config will be a pair of 146 GB mirrored as boot drives (and possibly access logging) and then a RAIDZ1 of 4 drives for max capacity (data is disposable as it is purely cached object data). Compression will be enabled on the disk cache RAIDZ1 to increase performance of cached data read from disk. (seeing as I have many CPU cycles to burn in these systems ;) ) I am hoping that these systems will have a L1ARC of around 10GB, L2ARC of 32GB and cache volume of ~420GB RAIDZ plus compression. We may add more drives or RAIDZ''s as we tweak the Squid cached object size. We are hoping to cache objects up to around 100 MB. Any comments on either system configuration and / or L2ARC support are invited from the list. Thanks, Scott. -- _______________________________________________________________________ Scott Lawson Systems Architect Manukau Institute of Technology Information Communication Technology Services Private Bag 94006 Manukau City Auckland New Zealand Phone : +64 09 968 7611 Fax : +64 09 968 7641 Mobile : +64 27 568 7611 mailto:scott at manukau.ac.nz http://www.manukau.ac.nz ________________________________________________________________________ perl -e ''print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'' ________________________________________________________________________
Bob Friesenhahn
2009-Jul-23 00:00 UTC
[zfs-discuss] L2ARC support in Solaris 10 (Update 8?)
On Thu, 23 Jul 2009, Scott Lawson wrote:> > The plan is to have a couple of x4240''s with Dual quad core > processors, 16 GB RAM and 6 x 146 GB 10K SAS drives plus 1 x 32 GB > SSD as L2ARC. I can add this later if support for this not available > at build time, but is road mapped for S8?I suggest maxing out your server RAM capacity before worrying about adding a L2ARC. The reason why is that RAM is full speed and contains the L1ARC. The only reason to do otherwise if if you can''t afford it. Bob -- Bob Friesenhahn bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/