John Drescher wrote: > On Wed, Jul 22, 2009 at 4:49 PM, Bob Hetzel<b...@case.edu> wrote: >> >> John Drescher wrote: >>> On Wed, Jul 22, 2009 at 3:30 PM, Bob Hetzel<b...@case.edu> wrote: >>>> Has anybody tinkered around with spooling backups on an SSD (aka solid >>>> state drive) or a raid-0 pair of them for higher performance? >>>> >>> I spool to a 4 drive sata raid 0 but since I only have a single >>> gigabit nic connection the file system performance is not the limiting >>> factor. >>> >>> John >> I'm trying to set up an LTO-3/LTO-4 setup and modern fast (15k rpm) >> conventional hard drives are > $500 each though it seems. >> >> For LTO-2 and below this is far cheaper since the tape drive speeds are so >> much lower but I'd like to keep the tape drive writing at > 60 MB/sec. In >> addition I'd like to keep concurrency up so one slow backup doesn't drag the >> prolong the others as badly. >> > How about 2 to 4 150 or 300GB velociraptors in raid 0. > > http://www.wdc.com/en/products/products.asp?driveid=459 > > The 300GB models are around $200 USA. Much faster than a 7200RPM sata > drive especially when it comes to seeks. > > For SSD it will be very expensive to do that unless you have a small > spool area.
In theory, the latency from random IO should be much closer to zero on a flash drive than on a thrashing hard drive, so I was hoping I might need only 1 or two 64GB or 128GB flash drives to provide decent spool size, perhaps not even raid-ed. In addition, SSD/flash drives should be silent and heat up the room less (although that latter effect will be small--10 watts vs 2 watts for each drive) ------------------------------------------------------------------------------ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
