On 13/03/2020 14:51, Steven Hammond wrote: > Does anyone have recommendations for MAXIMUM BLOCK SIZE for a LTO-7 > tape drive (HP). We are currently using 2M on the LTO-5 with success > (and it seemed to improve the speed). I didn't know if there was a > better setting for the LTO-7 (e.g., 4M) that should be used. Any > suggestions? >
2M is the largest that can be used (bacula won't support larger values) For better speeds, make sure you also tweak the following Maximum File Size = 15G Maximum Network Buffer Size = 262144 Maximum block size = 2M Maximum Spool Size = 630G Maximum Job Spool Size = 30G (these are the values used here, with a PCIe Optane P4800 800Gb SSD as bacula spool - this handles sustained simultaneous R/W in excess of 1200MB/s which you'll need if you're doing multiple simultaneous jobs - a _high end_ SATA SSD can _just_ cope with the spool load but you'll saturate the bus and possibly the SATA controller - most onboard chipsets are essentially only a single channel controller with a port multiplexer attached. In any case due to the volume of backups, if you're running a couple of TB/day you risk killing most NAND SSDs fairly quickly. > Steven Hammond > Technical Chemical Company > Cleburne, TX > > On 3/10/2020 12:38 PM, Gary R. Schmidt wrote: >> On 11/03/2020 02:26, Steven Hammond wrote: >>> We are currently using a LTO-5 drive. We are upgrading to a LTO-7 >>> drive. I noticed the directive in our pools STORAGE=LTO-5. I'd like >>> the existing pools to use LTO-7 (since it can still read LTO-5 >>> tapes). Can I just change the directive in the pool to use our new >>> LTO-7 tape drive OR will this mess up the existing LTO-5 tapes in >>> the pool. I was wanting to use the existing pools, but I could >>> create new ones if necessary. Thanks. >>> >> It's just a tag, it has no meaning, you could use "Bilbo-Baggins" and >> as long as you are consistent it doesn't matter what the contents of >> the "Storage" directive is. >> >> Cheers, >> Gary B-) >> >> P.S. It's considered impolite to change the Subject of an existing >> thread on a mailing list to start a new discussion, it buggers up >> MUAs that use the "Reference:" header to group things. >> >> >> _______________________________________________ >> Bacula-users mailing list >> Bacula-users@lists.sourceforge.net >> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Fbacula-users&data=02%7C01%7C%7C9b66e03453f34cc9e5fb08d7c75e4e7c%7C1faf88fea9984c5b93c9210a11d9a5c2%7C0%7C0%7C637197080163743078&sdata=P78pPKWkpvxNRPsOituNQZoVE%2F9UtpV09XFi4OlVm1w%3D&reserved=0 >> > > > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Fbacula-users&data=02%7C01%7C%7C9b66e03453f34cc9e5fb08d7c75e4e7c%7C1faf88fea9984c5b93c9210a11d9a5c2%7C0%7C0%7C637197080163743078&sdata=P78pPKWkpvxNRPsOituNQZoVE%2F9UtpV09XFi4OlVm1w%3D&reserved=0 > _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
