Hi again! I did some new performance-tests:
All operations are against a directory-tree with 7,255,659,224 bytes data in 98,025 files. | test1 | test2 | test3 | --------------------------------+-------+-------+-------+ bacula-fd, no compression, md5: | 10:25 | 10:42 | 10:15 | bacula-fd, GZIP, md5: | 16:09 | 15:46 | 17:02 | tar, local (1): | 8:37 | 8:53 | 8:54 | tar + nc (2): | 9:48 | 9:52 | 9:43 | tar + gzip + nc (3): | 14:11 | 14:26 | 15:03 | --------------------------------+-------+-------+-------+ (1) time /bin/sh -c "tar cf - directory | cat >/dev/null" (2) time /bin/sh -c "tar cf - directory | nc -q 0 backup_server 4711" (3) time /bin/sh -c "tar czf - directory | nc -q 0 backup_server 4711" This round of tests is more in line with what I expected, and the bacula performance is quite good. The only major difference compared to my previous tests is that the file-server disc-performance is much better. It seems like bacula suffers much more than tar from slow disc-performance on the file-server. backup-server and network performance don't seem to be an issue at all in the tests, even if write to TCP is a bit slower than /dev/null. However, both tar and bacula suffers from quite large slow-down when gzip is used. This is on an Athlon 64 X2 3800+ (2-core), running >50% idle during backup, leading me to believe that there are room for improvement. But part of the problem might be in the linux-kernel (2.6.17.8). At least when tar was running, the gzip process seemed to move from one CPU-core to the other very frequently. Anyway the performance of bacula is good enough for us at the moment. I can share one experience with you regarding disc-performance: Both our two Seagate ST3500641AS discs (500Gb Barracuda 7200.9, SATA) never completes the SMART extended self-test. It worked fine for ~6 months, and now both run forever. The drives report 30% remaining of the self-test, then ~2 hours later 10% remaining. After that it goes up to 40% remaining and the cycle repeats. Also when running the SMART extended self-test, the IO-performance is more than 10 times lower than normal (leading to very long backup-time). We have been in contact with Seagate about this, and have upgraded to the latest firmware, without any success. So I guess we will have to RMA the discs. / Anders ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users