On Thu, 24 Dec 2009 04:46:01 -0800, Christian Kujau wrote: > On Thu, 24 Dec 2009 04:21:13 -0800 (PST), Christian Kujau wrote: > > On Thu, 24 Dec 2009 at 21:06, Ryusuke Konishi wrote: > > > > Bonnie++ couldn't complete on nilfs2, only the generic tests > > > > and tiobench were run. > > > > > > I looked at the log but couldn't identify the error. > > > Is that a disk full? > > > > Well, bonnie++ just exits with: > > > > Create files in sequential order...Can't write data. > > Cleaning up test directory after error. > > > > ...which usually means that the disk is full. And I seem to remember that > > nilfs2 filesystems were indeed filling up as data is (re)written. However, > > I was just curious to test nilfs2 - I'm not even sure things like bonnie++ > > are supposed to run at all on a versioning file system :) > > > > I'll try to run a few more nilfs2 tests to find out of it's really an > > -ENOSPACE thing. > > I was curious enough to just do that right now: > > $ cat t-nilfs2.sh > #!/bin/sh > umount /mnt/d1 > mkfs.nilfs2 /dev/xvdb > mount -t nilfs2 -o barrier=off /dev/xvdb /mnt/d1 > for i in `seq 1 1000`; do > date > dd if=/dev/zero of=/mnt/d1/file.$i bs=1M count=100 2>/dev/null > sync && rm -v /mnt/d1/file.$i && sync > ls -la /mnt/d1 > df -k /mnt/d1 | grep -v Files > echo > done > -------------- > > So, basically I'm just writing 100MB to nilfs, then deleting the file > again, sync and making sure that file.$i has been indeed deleted. Here's > just the output from the df(1) commands: > > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/xvdb 2088956 114684 1867776 6% /mnt/d1 > /dev/xvdb 2088956 221180 1761280 12% /mnt/d1 > /dev/xvdb 2088956 327676 1654784 17% /mnt/d1 > /dev/xvdb 2088956 434172 1548288 22% /mnt/d1 > /dev/xvdb 2088956 524284 1458176 27% /mnt/d1 > /dev/xvdb 2088956 638972 1343488 33% /mnt/d1 > /dev/xvdb 2088956 745468 1236992 38% /mnt/d1 > /dev/xvdb 2088956 835580 1146880 43% /mnt/d1 > /dev/xvdb 2088956 958460 1024000 49% /mnt/d1 > /dev/xvdb 2088956 1056764 925696 54% /mnt/d1 > /dev/xvdb 2088956 1163260 819200 59% /mnt/d1 > /dev/xvdb 2088956 1261564 720896 64% /mnt/d1 > /dev/xvdb 2088956 1368060 614400 70% /mnt/d1 > /dev/xvdb 2088956 1482748 499712 75% /mnt/d1 > /dev/xvdb 2088956 1572860 409600 80% /mnt/d1 > /dev/xvdb 2088956 1687548 294912 86% /mnt/d1 > /dev/xvdb 2088956 1794044 188416 91% /mnt/d1 > /dev/xvdb 2088956 1892348 90112 96% /mnt/d1 > /dev/xvdb 2088956 1957884 24576 99% /mnt/d1 > /dev/xvdb 2088956 1974268 8192 100% /mnt/d1 > /dev/xvdb 2088956 1974268 8192 100% /mnt/d1 > /dev/xvdb 2088956 1974268 8192 100% /mnt/d1 > [...] > > With 8K free, dd(1) was unable to write any data to the filesystem. This > is all with Linux 2.6.32 (x86-64) and nilfs2-tools 2.0.14-5, but I think > this happened with earlier kernels too. Again, perhaps nilfs2 is > supposed to work that way, somewhere the "old" versions of the > filesystem have to be stored and this the fs fills up of course - but > you tell me :-) > > Christian.
Thank you for the quick responses. Yes, nilfs -- more precisely garbage collector of nilfs, by its nature, preserves old data within a period of time. So, it usually needs some care for this kind of test. Benchmark programs make fair amount of changes for the short run, by its very nature ;) Anyway, I'm relieved for now. Thanks, Ryusuke Konishi _______________________________________________ users mailing list [email protected] https://www.nilfs.org/mailman/listinfo/users
