On 22 January 2013 17:28, Bill Davidsen <davidsen@xxxxxxx> wrote: > Ian Malone wrote: >> >> Hi, >> >> Is anyone else seeing problems with F16 ext4? I recently moved my >> install onto a new harddisc (which is reporting SMART is fine after >> running a full test) and did that by making a new ext4 fs (previously >> ext3) then rsyncing across. I'm now seeing occasional system 'freezes' >> (not hard freezes, but programs can fail to start or freeze. Yesterday > I have multiple TB running on fc16+ext4, and have not seen any problems of > any kind with the filesystem. I do occasionally see a hang, this happens > with rsync if you copy something large to a machine with significant memory, > at the end rsync does a sync() I believe (if it was doing fsync() I think > the pain would be spread) and the system is emptying the i/o buffers to > disk. A typical single disk will write at 50-100MB/s and if you have 4GB or > more of backed up data, it will get slow. There are disk tuning tips you can > use to spread the pain, but it makes the copy of small files run slower in > many cases. > > If you have a lot of small files, your journal may be full of incomplete > transactions. The solution is to make the journal larger, I don't know if > modifying the journal after the fact will change that, or even if it's the > problem. I have played with putting journal on a faster device, 10k rpm > drive, SSD, or memory (yes, just for testing, I know it's unsafe). Faster > journal makes things faster with many small files. > > Lots of thoughts for you to check against your particular problems. > Any way to check the journal for incomplete transactions? Except for immediately after a crash the parition comes up clean in an e2fsck from a livecd. It made three clean passes through memtest, so I don't think that's the issue. -- imalone http://ibmalone.blogspot.co.uk -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
