Novell EDIRECTORY 8.8 - GUIDE, Руководство пользователя

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430 Novell eDirectory 8.8 Administration Guide
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Indira wants to do a full backup of eDirectory every Sunday night, and an incremental backup every
weeknight. She sets the unattended backups to run shortly before her full and incremental file
system backups each night, so her tape backups contain the eDirectory backup files as well as the
file system data. She has contracted with a remote data storage company to send the tape backups
offsite.
Every Monday morning, Indira checks the backup log to make sure the full backup was successful.
She also checks the logs occasionally during the week to make sure the incremental backups were
successful.
Indira decides not to turn on roll-forward logs for the following reasons:
• She does not have a separate storage device on her server, so turning on roll-forward logs
would not provide any additional backup of eDirectory. If there were a storage device failure,
the logs would be lost along with eDirectory, so there is no point in creating them.
• The tree does not change very much, and she is satisfied with being able to restore only up to
last night's backup. She doesn't need to be able to restore eDirectory to the moment before a
failure.
• Because the server does not participate in a replica ring with other servers, roll-forward logs are
not required for the restore verification process to be successful.
Stationery Supply, Inc. decides to reorganize the staff, so Indira does a manual backup before and
after making significant changes to the tree. Her strategy is to make a new backup of changes during
the middle of a weekday when necessary, instead of running roll-forward logs all the time.
To make sure her backup strategy is ready to go when she needs it, Indira tests it occasionally. She
doesn't have the budget to purchase a second server for testing, so she makes arrangements with a
test lab in her town. Using a server like hers in the test lab, she installs her operating system and tries
to approximate the environment of her eDirectory database. She restores her backups and checks to
make sure eDirectory is restored as she expects.
One Wednesday morning, the hard drive containing eDirectory on the server has a failure. Indira
obtains a new hard drive and the backup files from the full backup on Sunday evening, the
incremental backup on Monday evening, and the incremental backup on Tuesday evening. She
installs the new hard drive and installs eDirectory on it. Then she restores the full and incremental
backups. Any changes to the tree that were made on Wednesday morning before the hard drive
failure are lost because Indira was not running roll-forward logs on the server. But Indira is satisfied
with restoring only to last night's backup; she doesn't feel that running roll-forward logs would be
worth the administrative overhead.
14.10.2 Scenario: Losing a Hard Drive Containing eDirectory in
a Multiserver Environment
Jorge at Outdoor Recreation, Inc. has 10 servers running eDirectory. He does full backups every
Sunday night and incremental backups nightly, running the eDirectory backup shortly before the file
system backup to tape.
All of the servers are participating in replica rings. Jorge uses roll-forward logging for all the
servers. On each of his servers, he has placed the roll-forward logs on a different storage device than
eDirectory. He monitors the free space and rights on those storage devices to make sure the roll-
forward logs don't fill up the storage device. Occasionally he backs up the roll-forward logs to tape
and removes all except the one in use by eDirectory, to free up space.