I looked at using it here, but frankly if it can't survive even a simple reboot of one node in 6, its useless. On Mon, 2002-09-30 at 18:30, David Thomas wrote: > I just came from IEEE Cluster 2002 where there was a talk from the PVFS -- > parallel virtual file system. > > I understand that the performance of this software is outstanding. > It's not stable enough and fault-tolerant enough for the enterprise but it > might be interesting to test it out for ourselves on BLAST. Has anyone > played with it? > > Dave > > On Sat, Sep 21, 2002 at 07:01:34PM -0400, Chris Dagdigian (firstname.lastname@example.org) wrote: > Subject: Re: [Bioclusters] parallel blast??? > Message ID: <13526FA8-CDB6-11D6-8DCD-00039397F4C8@sonsorol.org> > > > > > Last time I looked at them solid state disks were amazingly expensive. > > I was thinking about trying them out as swap devices on a big > > alphaserver but ended up deciding to spend the $$ on more physical > > memory for the system. > > > > In a blast or blast-farm context I'd probably just skip the solid state > > disks and instead put the databases into a ramdisk. That would be a > > cheaper approach since you don't really need the > > data-is-kept-when-power-goes-away or the backup hard disk that solid > > state systems give you. You also are limited by whatever pipe connects > > the SSD to the system (SCSI?). > > > > Even ramdisks are of limited utility given the size and growth rate of > > some of the more common sequence databases -- you'd fall behind > > eventually. > > > > Although -- if you put 1 or 2 GB ramdisks in each of your cluster nodes > > and then set up a system for chunking blast databases into > > ramdisk-friendly sizes you could build a really fast blast farm. In > > that context the performance bottleneck would then become the time and > > resources needed to merge the XML output from N queries against split > > databases into a single result file. I've seen such systems in the past > > and merging the results could in some cases take longer than the actual > > search did. > > > > -Chris > > > > > > > > On Tuesday, September 17, 2002, at 08:38 AM, Steve Gaudet wrote: > > > > > Hello Chris, > > > > > >> <snip> > > >> > > >> You can have the fastest server on earth but if you searching with > > >> blast against an NFS mounted database and your network or > > >> fileserver is > > >> slow then your blast searching speeds will be horrible. Give > > >> me a small > > >> number of speedy linux boxes and I can bring a $300,000 > > >> NFS/NAS system > > >> to its knees. Storage does matter. > > > > > > Anyone ever look or try solid state disks? > > > > > > > > >> <snip> > > > > _______________________________________________ > > Bioclusters maillist - Bioclusters@bioinformatics.org > > https://bioinformatics.org/mailman/listinfo/bioclusters > _______________________________________________ > Bioclusters maillist - Bioclusters@bioinformatics.org > https://bioinformatics.org/mailman/listinfo/bioclusters > > -- Hunter Matthews Unix / Network Administrator Office: BioScience 145/244 Duke Univ. Biology Department Key: F0F88438 / FFB5 34C0 B350 99A4 BB02 9779 A5DB 8B09 F0F8 8438 Never take candy from strangers. Especially on the internet.