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The verify routine with indexing enabled takes a very long time. In some
instances, taking as long as 24 hours.
For example, using the "/etc/edge.nightly" cron entry, configured by
"/etc/edge.cronset", backing up 8GB approximately to DLT tape takes
approximately one hour. However, the verification process takes almost
24 hours to complete.
This problem is not specific to DLT drives, or even to tape drives. Other
backup media types (disk files, DVD-RAM, etc.) are also affected.
If your verify is taking an unusually long time to complete with the index
option enabled but returns to a normal speed when indexing is disabled, then
you may be suffering from this problem.
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Producing indexes for Fast File Restore can take a very long time
depending on the file names present on the system. Directories that contain
a large number (thousands) of files can cause the indexing operation to
perform extremely slowly.
This has been traced to a cache problem with edge.index, the
BackupEDGE indexing program.
By default, BackupEDGE's "edge.nightly" will verify
and index the tape for Fast File Restore.
An extract from the BackupEDGE manual states:
If you are going to index a tape, it is strongly recommended that you
also perform a Bit-Level Verification on the tape since it does not take
significantly more time than an index alone.
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If you are using 01.01.08 or earlier, disable indexing or contact
Microlite Support.
This problem has been reported to Microlite Support and has been
resolved in: BackupEDGE 01.02.01 Build 1.
If you are using 01.02.00 build 4 or earlier, download and install the most current release of BackupEDGE 01.02.01 or later.
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