Hello, I'm new to LTO backup and Bacula usage so may be not enough knowledge.
My LTO7 or even LTO3 media not run smooth during backup. Not know if it's shoe shining effect but seem something like that. You can hear it media stop and restart each some seconds or view on file/network monitoring than bandwidth stop and restart some seconds later. I try to remove MD5 checksum but seem change nothing always the same issue with signature None or MD5. Spool parameter seem to change nothing too with 50go or 900go spool size is the same issue. I try directly from a network share with enough bandwidth after I try to use a SSD spool 1tb with ~400mo/sec read capabilities when I copy file to the memory or on /dev/null so can sustain without issue a LTO7 drive. The bandwidth speed reach something like ~200mo/sec drop and return to ~200mo/sec. If I use tar cvf command to copy the same folder directly to lto drive seem run smooth without any interrupt. Bandwidth is stable at ~118mo/sec seem low for a LTO7 media but not have any stop and restart. It's the same with LTO3 media with less bandwidth usage. What can be the issue if it's not normal with Bacula ? Database too slow to write entries but stored on a old SSD so not a lot of bandwidth but 50mo/sec without issue for record md5 checksum should be enough. CPU who calculate checksum files too slow Bacula wait on CPU and restart with next file ? One missed parameter for keep some gb in a memory buffer ? I check PCIe bandwidth with 5Gb/s at 8x. I not want to destroy my LTO drive or media due to all of these stops each some seconds. Thank you for your help _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
