Computer Associates BABWBR1151S40 User Guide - Page 119

Backup Recommendations, Using Best Practices

Get Computer Associates BABWBR1151S40 - CA Arcserve Bkup R11.5 Win Ent Module PDF manuals and user guides
UPC - 757943307429
View all Computer Associates BABWBR1151S40 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 119 highlights

Backup Recommendations ■ Enable multiplexing to take advantage of high performance devices. Because destination devices are faster than a single Document Level backup stream, multiplexing decreases backup time by dividing your backup jobs into several sub-jobs that run simultaneously to the same device. If you enable multiplexing and also want to increase the value of the Number of Threads configuration setting, keep in mind that the Number of Threads value is per each backup stream. Therefore, the actual number of threads running on a system is the number of streams multiplied by the number of threads. As a result, leveraging multiplexing before leveraging the Number of Threads is optimal. For example, on a four processor machine with four storage groups, a total of six to eight threads is recommended. These threads should be configured as two threads per each storage group, resulting in four multiplexing streams. Because storage groups are independent resources, it is better to increase the level of streams with multiplexing than to increase the Number of Threads and sequentially back up one storage group at a time. ■ Enable the Complete Messaging Single Instance Storage configuration option. This option checks to see if attachments and messages have already been backed up and backs up only one copy, eliminating the need to back up an attachment or message each time it is referenced. This can significantly decrease the size of your backups. ■ If you are creating a short backup job or do not need an estimate of how long the job will take, enable the Disable File Estimate global option to save time. ■ Use incremental and differential backup methods to back up only the data that has changed since your last full or incremental backup. This saves time by backing up only changed data rather than backing up all of your data. ■ Use backup filters. This lets you exclude unwanted and large amounts of data from your backup jobs. ■ If you want to reduce the disk space usage on your backup server, enable the Disable Database Recording global option when creating your backup job so that detail logs of every document are not recorded in the CA ARCserve Backup database. If you use this option and later want to restore, you must first submit a Merge Media operation. ■ If media usage is a major factor in your backup strategy, either perform full backups daily or full alternating with differential backups daily. ■ In an environment that has non mission-critical data with less aggressive restore schedules, you should perform a full backup at least once a week and perform incremental or differential backups on the other days. Chapter 6: Using Best Practices 119

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
Backup Recommendations
■
Enable multiplexing to take advantage of high performance devices.
Because destination devices are faster than a single Document Level
backup stream, multiplexing decreases backup time by dividing your
backup jobs into several sub-jobs that run simultaneously to the same
device.
If you enable multiplexing and also want to increase the value of the
Number of Threads configuration setting, keep in mind that the Number of
Threads value is per each backup stream. Therefore, the actual number of
threads running on a system is the number of streams multiplied by the
number of threads. As a result, leveraging multiplexing before leveraging
the Number of Threads is optimal. For example, on a four processor
machine with four storage groups, a total of six to eight threads is
recommended. These threads should be configured as two threads per
each storage group, resulting in four multiplexing streams. Because
storage groups are independent resources, it is better to increase the level
of streams with multiplexing than to increase the Number of Threads and
sequentially back up one storage group at a time.
■
Enable the Complete Messaging Single Instance Storage configuration
option. This option checks to see if attachments and messages have
already been backed up and backs up only one copy, eliminating the need
to back up an attachment or message each time it is referenced. This can
significantly decrease the size of your backups.
■
If you are creating a short backup job or do not need an estimate of how
long the job will take, enable the Disable File Estimate global option to
save time.
■
Use incremental and differential backup methods to back up only the data
that has changed since your last full or incremental backup. This saves
time by backing up only changed data rather than backing up all of your
data.
■
Use backup filters. This lets you exclude unwanted and large amounts of
data from your backup jobs.
■
If you want to reduce the disk space usage on your backup server, enable
the Disable Database Recording global option when creating your backup
job so that detail logs of every document are not recorded in the CA
ARCserve Backup database. If you use this option and later want to
restore, you must first submit a Merge Media operation.
■
If media usage is a major factor in your backup strategy, either perform
full backups daily or full alternating with differential backups daily.
■
In an environment that has non mission-critical data with less aggressive
restore schedules, you should perform a full backup at least once a week
and perform incremental or differential backups on the other days.
Chapter 6: Using Best Practices
119