diff options
author | Andre Noll <maan@tuebingen.mpg.de> | 2015-08-24 16:40:06 +0300 |
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committer | Joerg Steffens <joerg.steffens@bareos.com> | 2015-12-09 19:06:08 +0300 |
commit | e451c9be5e89061c76d2e5937fb8dc398954c324 (patch) | |
tree | 4fdea696eadb567302743b9fbdc1ab0dd8cab2dc | |
parent | 20803a4feb08c8cd9e8558f914a579ff2a77d912 (diff) |
migration: Shorten and improve section on scalability.
The remark on scalability was a bit too pessimistic: when migrating
many volumes, some of the jobs may well run simultaneously.
-rw-r--r-- | manuals/en/main/migration.tex | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/manuals/en/main/migration.tex b/manuals/en/main/migration.tex index ae305f3..ee01f03 100644 --- a/manuals/en/main/migration.tex +++ b/manuals/en/main/migration.tex @@ -72,16 +72,12 @@ Normally three jobs are involved during a migration: do a restore, the data will be read from this Job. \end{itemize} -If the Migration control job finds a number of JobIds to migrate (e.g. -it is asked to migrate one or more Volumes), it will start one new -migration backup job for each JobId found on the specified Volumes. -Please note that Migration doesn't scale too well since Migrations are -done on a Job by Job basis. This if you select a very large volume or -a number of volumes for migration, you may have a large number of -Jobs that start. Because each job must read the same Volume, they will -run consecutively (not simultaneously). - - +If the Migration control Job finds more than one existing Job to +migrate, it creates one migration job for each of them. This may result +in a large number of Jobs. Please note that Migration doesn't scale too +well if you migrate data off of a large Volume because each job must +read the same Volume, hence the jobs will have to run consecutively +rather than simultaneously. \section{Important Migration Considerations} \index[general]{Important Migration Considerations} |