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Documentation tip about dealing with hangs when database hook is enabled.

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Dan Helfman 2022-03-12 13:17:32 -08:00
parent 976516d0e1
commit 95c518e59b
1 changed files with 9 additions and 4 deletions
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docs/how-to/backup-your-databases.md
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@ -199,10 +199,10 @@ backups to avoid getting caught without a way to restore a database.
databases that share the exact same name on different hosts. databases that share the exact same name on different hosts.
4. Because database hooks implicitly enable the `read_special` configuration 4. Because database hooks implicitly enable the `read_special` configuration
setting to support dump and restore streaming, you'll need to ensure that any setting to support dump and restore streaming, you'll need to ensure that any
special files are excluded from backups (named pipes, block devices, and special files are excluded from backups (named pipes, block devices,
character devices) to prevent hanging. Try a command like `find / -type c,b,p` character devices, and sockets) to prevent hanging. Try a command like
to find such files. Common directories to exclude are `/dev` and `/run`, but `find /your/source/path -type c,b,p,s` to find such files. Common directories
that may not be exhaustive. to exclude are `/dev` and `/run`, but that may not be exhaustive.
### Manual restoration ### Manual restoration
@ -246,3 +246,8 @@ hooks:
See Limitations above about `read_special`. You may need to exclude certain See Limitations above about `read_special`. You may need to exclude certain
paths with named pipes, block devices, or character devices on which borgmatic paths with named pipes, block devices, or character devices on which borgmatic
is hanging. is hanging.
Alternatively, if excluding special files is too onerous, you can create two
separate borgmatic configuration files—one for your source files and a
separate one for backing up databases. That way, the database `read_special`
option will not be active when backing up special files.