January 11, 201313 yr I upgraded to rc8a while diagnosing my disconnecting drives. Now that my server is up and running and I copying my first new content to it since upgrading from rc6-test2 to rc8a Not only was my parity sync speed halved (which I can live with I guess), but now my write speed is halved. For many years I have always written to my server at 24 MB/s, and now I am writing at 12-14 MB/s. I have tried both small and large files, same result. Anything I can do? I don't want to downgrade due to drivers for my Supermicro controller card drivers it is recommended rc8a Syslog attached syslogJan10.txt
January 11, 201313 yr Author I didn't know it was out, will do right away and report back findings, thank you.
January 11, 201313 yr Author Do I really need to run the new permissions script when going rc8a to rc9a? I don't have multiple users or anything.
January 11, 201313 yr Author How long should this process take? 10 minutes in, it is still on disk 1 in the browser log it opened: /usr/local/sbin/newperms processing /mnt/disk1 ... chmod -R u-x,go-rwx,go+u,ugo+X /mnt/disk1 Can I read from my server while this goes on? How long should it take I have 15 drives 2-3TB each full
January 11, 201313 yr I am a firm believer to not mess with anything during these one off type changes. It will take a while. Thankfully this version should show the progress in its entirety (per Tom), where previous versions did not. I am in the process of moving over to RC9a myself and will be in the waiting game for the new permissions to complete as you (I have 17 drive to wait on; 2-3TB each )
January 11, 201313 yr Author No change in write speed after upgrade to rc9a, still 12-14 MB/s, used to get very consistent 24 MB/s.
January 11, 201313 yr Author I can also confirm that my disk rebuilding speed is unaffected, running at 98-108 MB/s right now on a disk upgrade I am performing
January 12, 201313 yr Author This 12 MB/s write speed is brutal, what steps can I take to figure out what the problem is?
January 12, 201313 yr Did you try this? http://lime-technology.com/forum/index.php?topic=22675.msg213845#msg213845
January 12, 201313 yr Author No change on a 20gig file transfer, still going between 12 and 14 MB/s after running that command.
January 14, 201313 yr Author Upgraded to rc10, not change in write speed, actually a bit slower, 11-12.5 MB/s on 20gig file transfer.
January 14, 201313 yr Author After some reading, my motherboard limits my second PCI-e x16 slot to PCI-e X4 speed. Would 8 drives running off a PCI-e x4 slot bottleneck write speed? I thought each pci-e 2.0 lane could support 2 hard drives at full speed, meaning a x4 slot would be find for 8 drives?
January 14, 201313 yr Author Replaced my supermicro controllers with m1015 controllers, no change with regular settings, slight increase to 15 MB/s when I set sysctl vm.highmem_is_dirtyable=1
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