Hello, My employer allowed me to publish the data, so here you go: http://www.accelcloud.com/2012/04/18/linux-flashcache-and-bcache-performance-testing/ On Tue, Apr 17, 2012 at 10:30 AM, Kent Overstreet <koverstreet@xxxxxxxxxx> wrote: > Hey, sorry for the delay. Was travelling and I've been slow to catch > up on email... > > On Fri, Apr 6, 2012 at 6:21 AM, Alexandru Ionica > <alexandru.ionica@xxxxxxxxx> wrote: >> Hello, >> >> I have been doing several benchmarks (Phoronix test suite, disk suite) and >> I'm really impressed with the performance when doing writeback caching. For >> the benchmarks I did a git checkout and compiled the 3.1.0+ kernel. As the >> wiki is outdated I am wondering if the patches have also been applied on a >> kernel version which is used by server oriented distributions, meaning >> kernel version 2.6.32 for example or if there is a way to apply the patches >> (if they exist separately) to kernel version 2.6.32 . >> I am interested in this specific version of the kernel as other constrains >> impose it. > > Any chance you could share those benchmarks? I'll post them on the > wiki (or give you an account). I could really use some benchmarks that > are suitable for sharing, all the benchmarking I've done has been just > focused on optimizing stuff. > >> Also ... do you think that your code is production ready when using bcache >> to do writeback caching ? Of course I will keep testing but I'd like to >> know if you think the code by now is production ready. > > Yeah, it is. Test it on your configuration, etc. etc. but writeback is > pretty mature and well tested at this point. > >> Basically I plan to run a setup like: bcache device assembled from software >> raid10 or raid0 (4 disk) + ssd ; on top of this a volume group ; on top of >> logical devices drbd setup . We are running this for a long while without >> bcache so the setup is stable and the new part here would be bcache. > > Sounds pretty reasonable. > >> P.S. during the benchmarks bcache outperformed in every way flashcache (I >> tried two different sequential size settings with flash cache, both >> underperformed) > > Cool! Would love to see the numbers :) > >> Regards, >> >> Alexandru Ionica >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
