search for: 1280ml

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2009 May 13
2
With RAID-Z2 under load, machine stops responding to local or remote login
...mostly spending my time. I read one or two guides, but I don''t follow how the output of it is meaningful. I''m sending this to zfs-discuss as I can''t replicate this problem unless I''m doing heavy I/O on ZFS. (Final note - this 10-disk pool is serviced by an ARC 1280ML, and during the time the kernel is heavily under load, zpool iostat -v is reporting no more than 1 MB/s per disk, and almost always to the tune of 128 KB/s.) - Rich -- The generation of random numbers is too important to be left to chance.
2009 Apr 23
1
Unexpectedly poor 10-disk RAID-Z2 performance?
...'ve got a 10-disk RAID-Z2 backed by the 1.5 TB Seagate drives everyone''s so fond of. They''ve all received a firmware upgrade (the sane one, not the one that caused your drives to brick if the internal event log hit the wrong number on boot). They''re attached to an ARC-1280ML, a reasonably good SATA controller, which has 1 GB of ECC DDR2 for caching purposes. The machine this is all inside of is backed by an nForce 4 chipset [hahaha], with a dual-core 1.8 GHz Opteron and 4 GB of ECC RAM onboard. No swap is enabled. I''m running snv_112. I expect to get very n...