私が管理するバックアップシステムが最初から正しく設定されていないので、このように遅いのではないかと思います。
バックアップ先： rsnapshotを使用して、NASストレージ（Terastation Buffalo NAS）から1GBスイッチを介してUbuntuシステムに毎日増分バックアップを実行しました。
質問： RSnapshoptは1日9時間ずつ約160GBのデータを比較するのにかなり長い時間のように感じますが、どうなるかわかりません。
詳細： rsnapshot は cron によって毎日呼び出されます。
rsnapshot.conf ファイルがデフォルトのテンプレートとして表示されます。
#######################
# CONFIG FILE VERSION #
#######################
config_version 1.2
###########################
# SNAPSHOT ROOT DIRECTORY #
###########################
# All snapshots will be stored under this root directory.
#
snapshot_root /srv/backups/
# If no_create_root is enabled, rsnapshot will not automatically create the
# snapshot_root directory. This is particularly useful if you are backing
# up to removable media, such as a FireWire or USB drive.
#
no_create_root 1
#################################
# EXTERNAL PROGRAM DEPENDENCIES #
#################################
# LINUX USERS: Be sure to uncomment "cmd_cp". This gives you extra features.
# EVERYONE ELSE: Leave "cmd_cp" commented out for compatibility.
#
# See the README file or the man page for more details.
#
cmd_cp /bin/cp
# uncomment this to use the rm program instead of the built-in perl routine.
#
cmd_rm /bin/rm
# rsync must be enabled for anything to work. This is the only command that
# must be enabled.
#
cmd_rsync /usr/bin/rsync
# Comment this out to disable syslog support.
#
cmd_logger /usr/bin/logger
# Uncomment this to specify the path to "du" for disk usage checks.
# If you have an older version of "du", you may also want to check the
# "du_args" parameter below.
#
#cmd_du /usr/bin/du
# Uncomment this to specify the path to rsnapshot-diff.
#
cmd_rsnapshot_diff /usr/bin/rsnapshot-diff
#########################################
# BACKUP INTERVALS #
# Must be unique and in ascending order #
# i.e. hourly, daily, weekly, etc. #
#########################################
interval daily 7
interval weekly 4
interval monthly 3
############################################
# GLOBAL OPTIONS #
# All are optional, with sensible defaults #
############################################
# Verbose level, 1 through 5.
# 1 Quiet Print fatal errors only
# 2 Default Print errors and warnings only
# 3 Verbose Show equivalent shell commands being executed
# 4 Extra Verbose Show extra verbose information
# 5 Debug mode Everything
#
verbose 2
# Same as "verbose" above, but controls the amount of data sent to the
# logfile, if one is being used. The default is 3.
#
loglevel 3
# If you enable this, data will be written to the file you specify. The
# amount of data written is controlled by the "loglevel" parameter.
#
logfile /var/log/rsnapshot
# If enabled, rsnapshot will write a lockfile to prevent two instances
# from running simultaneously (and messing up the snapshot_root).
# If you enable this, make sure the lockfile directory is not world
# writable. Otherwise anyone can prevent the program from running.
#
lockfile /var/run/rsnapshot.pid
# Default rsync args. All rsync commands have at least these options set.
#
#rsync_short_args -a
#rsync_long_args --delete --numeric-ids --relative --delete-excluded
# Default arguments for the "du" program (for disk space reporting).
# The GNU version of "du" is preferred. See the man page for more details.
# If your version of "du" doesn't support the -h flag, try -k flag instead.
#
#du_args -csh
# The include_file and exclude_file parameters, if enabled, simply get
# passed directly to rsync. Please look up the --include-from and
# --exclude-from options in the rsync man page for more details.
#
#include_file /path/to/include/file
#exclude_file /path/to/exclude/file
# If your version of rsync supports --link-dest, consider enable this.
# This is the best way to support special files (FIFOs, etc) cross-platform.
# The default is 0 (off).
#
#link_dest 0
# When sync_first is enabled, it changes the default behaviour of rsnapshot.
# Normally, when rsnapshot is called with its lowest interval
# (i.e.: "rsnapshot hourly"), it will sync files AND rotate the lowest
# intervals. With sync_first enabled, "rsnapshot sync" handles the file sync,
# and all interval calls simply rotate files. See the man page for more
# details. The default is 0 (off).
#
#sync_first 0
# If enabled, rsnapshot will move the oldest directory for each interval
# to [interval_name].delete, then it will remove the lockfile and delete
# that directory just before it exits. The default is 0 (off).
#
#use_lazy_deletes 0
###############################
### BACKUP POINTS / SCRIPTS ###
###############################
# LOCALHOST
backup_script /usr/local/bin/backup_smb_share_All.sh All/
すべてのbackup_script "backup_smb_share_All.sh"には、デフォルトで次のものが含まれます。
smbclient <hostname>/<share> -U<username>%<password> -Tc - 2>/dev/null | tar xf -
注：スクリプトにユーザー名とパスワードをハードコードするのは悪い習慣であることがわかります。
このスクリプトの私の理解は多少曖昧ですが、主にログインして「Tar」設定を構成するようです。データをコピーしているようですが、上記の行ではどのように構成されているのかわかりません。
ログ（/var/logs/rsnapshot）を見ると、次のことが起こります。
[05/Jan/2015:02:43:47] mkdir -m 0755 -p /srv/backups/tmp/
[05/Jan/2015:02:43:47] cd /srv/backups/tmp/
[05/Jan/2015:02:43:47] /usr/local/bin/backup_smb_share_All.sh
[05/Jan/2015:04:44:15] cd /root/
[05/Jan/2015:04:44:15] sync_if_different("/srv/backups/tmp/", "/srv/backups/daily.0/All/")
[05/Jan/2015:13:43:25] /bin/rm -rf /srv/backups/tmp/
- バックアップスクリプトは合理的ですか？
- ビューのボトルネックは「sync_if_ Different」ですが、これはUbuntuサーバーのパフォーマンス制限ですか？
- これらのシステムでは、これらすべてが期待されていますか？