Joe G (Joseph George) wrote: > Moinak, > > What are the benefits of getting this I/O scheduler into > Nevada/OpenSolaris? Would this be a good project for this community > to attempt? This I/O scheduler improves data cd access times in the generic case, though I'd need to do some measurements especially the impact on single thread access times like a find. This should help if integrated back into OpenSolaris since it is mount option.
Actually it will be interesting to see whether using this algorithm benefits UFS, the standard filesystem on OpenSolaris. That will be a project of moderate difficulty since writes will now have to be scheduled and DTrace I/O snooping behavior should be preserved. It will be good to have community participation in this. Regards, Moinak. > > ~Joe > > > Moinak Ghosh wrote: >> Sriram Narayanan wrote: >> >>> Hi all: >>> >>> I decided to give Nexenta Live CD a spin. Here are my observations. >>> >>> 1. Inordinately long boot time. >>> After Belenix 0.4.3a's snappy boot up (LiveCD as well as hard disk >>> based), I was disappointed with NExenta's ~7 minute startup time. >> >> It's gonna snap quite a bit more. Yesterday I completed writing an I/O >> scheduler for hsfs, the CDROM filesystem in OpenSolaris that is also >> known as iso9660 filesystem on Linux. >> >> The I/O scheduler reorders I/O requests and combines adjacent requests >> into a single one. On initial testing I am seeing a 20 second >> reduction in >> boot time. So Xfce boot takes 1 min 40 seconds on my ferrari laptop >> with network enabled. It will be faster on a desktop since the >> Ferrari's >> CDROM is really slow. >> >> I will try to explain this in layman's terms in the next Bosug >> meet. For >> now I can say that this I/O scheduler implements C-LOOK + deadline >> + I/O coalescing. C-LOOK is a variant of C-SCAN. >> >>> >>> 2. Lack of easily available documentaion on the LiveCD >>> Neither at their site, nor on the console mode on the boot up mode. >> >> To be fair BeleniX also needs a bunch of docs on the CD though the >> site and Wiki has docs. >> >> Regards, >> Moinak. >> >>> >>> 3. No information of the username/password required to log onto the >>> LiveCD. >>> >>> Duh, I'll try the hard disk installer tomorrow. >>> >>> -- Ram >>> _______________________________________________ >>> ug-bosug mailing list >>> List-Unsubscribe: mailto:ug-bosug-unsubscribe at opensolaris.org >>> List-Owner: mailto:ug-bosug-owner at opensolaris.org >>> List-Archives: http://www.opensolaris.org/jive/forum.jspa?forumID=54 >> >> >> _______________________________________________ >> ug-bosug mailing list >> List-Unsubscribe: mailto:ug-bosug-unsubscribe at opensolaris.org >> List-Owner: mailto:ug-bosug-owner at opensolaris.org >> List-Archives: http://www.opensolaris.org/jive/forum.jspa?forumID=54 > _______________________________________________ > ug-bosug mailing list > List-Unsubscribe: mailto:ug-bosug-unsubscribe at opensolaris.org > List-Owner: mailto:ug-bosug-owner at opensolaris.org > List-Archives: http://www.opensolaris.org/jive/forum.jspa?forumID=54
