i am using the following command to backup and sql file:
tar -zcvf "$BACKUP_DST/$FILE_NAME.tgz" "$BACKUP_DST/$FILE_NAME.sql"
i want to make sure the compressed file wont be larger then 300mb, if it exceeds 300mb, split it into several files.
any thoughts?
Best Answer
I don't think
tar
has functionality built-in to split at an arbitrary size (there is-M
for multi-volume, but this relies on the destination media detecting an out-of-space condition), but there are two things you could do:split
command to divide it into sections (andcat
to join them back together for decompression).Use dar instead of tar, since this has splitting functionality built in (amongst a lot of other features that tar doesn't have). For example
$ dar -c "$BACKUPNAME" -g "$INPUTFILE.sql" -s300M -z