Thread: Linux filesystem shootout
...and on Thu, Oct 09, 2003 at 04:42:53PM +0530, Shridhar Daithankar used the keyboard: > > http://www.ussg.iu.edu/hypermail/linux/kernel/0310.1/0208.html > > Shridhar My $0.1: I just stumbled across an interesting filesystem comparison table today, comparing ext2/ext3/reiser/reiser4/jfs/xfs on a single UP P2/450 machine with an old UDMA2 Seagate. Now however archaic this box may have been, I think that the tests still bear some objectivity, as it's a comparison test and not some "how much can we squeeze out of xyz" type of bragging. The tests were done using bonnie++ and IOZone and are essentially just a couple of tables listing the average results achieved by each of those tests. Also, ext3, reiser and reiser4 were tested in a couple of different configurations (reiser4 extents, reiser notail, ext3 journal, ordered and writeback mode). Oh, i shouldn't forget - the address is http://fsbench.netnation.com/ :) Cheers, -- Grega Bremec Sistemska administracija in podpora grega.bremec-at-noviforum.si http://najdi.si/ http://www.noviforum.si/
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I should at least read the URLs before re-posting info.
My bad, I'm utterly sorry about this... :-(
Cheers,
--
Grega Bremec
Sistemska administracija in podpora
grega.bremec-at-noviforum.si
http://najdi.si/
http://www.noviforum.si/
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<br /><blockquote cite="mid20031009121124.GA7038@elbereth.noviforum.si" type="cite"><blockquote type="cite"><pre wrap=""><aclass="moz-txt-link-freetext" href="http://www.ussg.iu.edu/hypermail/linux/kernel/0310.1/0208.html">http://www.ussg.iu.edu/hypermail/linux/kernel/0310.1/0208.html</a> Shridhar </pre></blockquote><pre wrap=""></pre></blockquote> I feel incompetent when it comes to file systems. Yet everybodywould like to have the best file system if given the choice...so do I :) Here I am looking at those tables seeingJFS having more green cells than others. The more green the better right? So based on these tests JFS ought to be theone?<br /><br /> Kaarel<br />
Kaarel wrote: >>>http://www.ussg.iu.edu/hypermail/linux/kernel/0310.1/0208.html >>> >>>Shridhar >>> >>> > I feel incompetent when it comes to file systems. Yet everybody would like to > have the best file system if given the choice...so do I :) Here I am looking at > those tables seeing JFS having more green cells than others. The more green the > better right? So based on these tests JFS ought to be the one? Yes and no. Yes for the results. No for the tests that weren't run. Database load is quite different. Its mixture of read and write load with a dynamics varying from one extreme to other, between these two. All it says that if you want to choose a good file system for postgresql, look at JFS first..:-) Besides all the tests were done on files file bigger than 1GB. If single file size is restricted to 1GB, it might produce a different result set. And postgresql does not exceed 1GB limit per file. So still, quite a few unknowns there.. Best thing could be repeat those benchmarks on $PGDATA with your live data inside it. It could mimmic the load pretty well.. Shridhar
Kaarel wrote: > >>>http://www.ussg.iu.edu/hypermail/linux/kernel/0310.1/0208.html >>> >>>Shridhar >>> > I feel incompetent when it comes to file systems. Yet everybody would > like to have the best file system if given the choice...so do I :) Here > I am looking at those tables seeing JFS having more green cells than > others. The more green the better right? So based on these tests JFS > ought to be the one? Those tests seem to align with the ones I did recently: http://www.potentialtech.com/wmoran/postgresql.php#results There were less filesystems involved, and the data is less comprehensive, but probably a little easier to understand (i.e. -> fastest filesystem at the top of the graph, slowest at the bottom). I've been telling people that JFS is fastest. This is definately oversimplified, since the "shoot out" shows that it's not _always_ fastest, but for people who just want to make a good initial choice, and won't do their own testing to find out what's fastest in their configuration (for whatever reason), I think JFS is the safest bet. Since it's a journalling filesystem as well, it should have good recoverability in the even of catastrophy, but I haven't tested that. -- Bill Moran Potential Technologies http://www.potentialtech.com
On Thu, 9 Oct 2003, Shridhar Daithankar wrote: > Kaarel wrote: > >>>http://www.ussg.iu.edu/hypermail/linux/kernel/0310.1/0208.html > >>> > >>>Shridhar > >>> > >>> > > I feel incompetent when it comes to file systems. Yet everybody would like to > > have the best file system if given the choice...so do I :) Here I am looking at > > those tables seeing JFS having more green cells than others. The more green the > > better right? So based on these tests JFS ought to be the one? > > Yes and no. Yes for the results. No for the tests that weren't run. > > Database load is quite different. Its mixture of read and write load with a > dynamics varying from one extreme to other, between these two. > > All it says that if you want to choose a good file system for postgresql, look > at JFS first..:-) > > Besides all the tests were done on files file bigger than 1GB. If single file > size is restricted to 1GB, it might produce a different result set. And > postgresql does not exceed 1GB limit per file. > > So still, quite a few unknowns there.. Absolutely. For instance, one file system may be faster on a RAID card with battery backed cache, while another may be faster on an IDE drive with write cache disabled, while another may be faster on software RAID1, while another might be faster on software RAID5. If you haven't tested different file systems on your setup, you don't really know which will be faster until you do.