Hi Geovanni I was monitering the ssd cache using zpool iostat -v like you said. the cache device within the pool was showing a persistent write IOPS during the ten (1GB) file creation phase by the benchmark.
The benchmark even gave an insufficient space and terminated which proves that it was writing on the ssd cache (my HDD is 50GB free space) !!!!!!!! thanks On Fri, Mar 5, 2010 at 5:13 AM, Giovanni Tirloni <gtirl...@sysdroid.com>wrote: > On Fri, Mar 5, 2010 at 6:46 AM, Abdullah Al-Dahlawi <dahl...@ieee.org>wrote: > >> Greeting All >> >> I have create a pool that consists oh a hard disk and a ssd as a cache >> >> zpool create hdd c11t0d0p3 >> zpool add hdd cache c8t0d0p0 - cache device >> >> I ran an OLTP bench mark to emulate a DMBS >> >> One I ran the benchmark, the pool started create the database file on the >> ssd cache device ??????????? >> >> >> can any one explain why this happening ? >> >> is not L2ARC is used to absorb the evicted data from ARC ? >> >> why it is used this way ??? >> >> > Hello Abdullah, > > I don't think I understand. How are you seeing files being created on the > SSD disk ? > > You can check device usage with `zpool iostat -v hdd`. Please also send > the output of `zpool status hdd`. > > Thank you, > > -- > Giovanni Tirloni > sysdroid.com > -- Abdullah Al-Dahlawi PhD Candidate George Washington University Department. Of Electrical & Computer Engineering ---- Check The Fastest 500 Super Computers Worldwide http://www.top500.org/list/2009/11/100
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