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netbackup 5.1 在HP-UX上的疑难问题,请大家来看看
是,可能是原来的主机SCSI口跟机械臂之间有点问题。还好正式的生产系统是FC的。今天下午,这是我调整Netbackup备份速的资料,希望对大家以后又帮助,也希望大家来讨论。我现在两个driver备份的总速度有28M/S,跟windows的持平。
Data Buffer Size & Number of Data Buffers.
The NetBackup media server uses shared memory to buffer data between the network and the tape drive (or between the disk and the tape drive if the NetBackup media server and client are the same system). By default, NetBackup uses a default value of 8 x 32KB shared memory buffers for non-multiplexed backups and 4 x 64KB for a multiplexed backup.
These buffers can be configured by creating the files /usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS and /usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS on the NetBackup media server. These parameters are meant exclusively for media servers, and should not be used on a pure master server or client.
The SIZE_DATA_BUFFERS file should contain a single line specifying the data buffer size in bytes in decimal format.
The NUMBER_DATA_BUFFERS file should contain a single line specifying the number of data buffers in decimal format.
The value in the SIZE_DATA_BUFFERS file has to be a multiple of 1024B.
It is common to increase SIZE_DATA_BUFFERS to 256KB and NUMBER_DATA_BUFFERS to 16.
IMPORTANT: Because the data buffer size equals the tape I/O size, the value specified in SIZE_DATA_BUFFERS must not exceed the maximum tape I/O size supported by the tape drive or operating system. This is usually 256K or 128K bytes.
In order to configure NetBackup to use 16 x 256KB data buffers, specify 262144 (256 x 1024) in SIZE_DATA_BUFFERS and 16 in NUMBER_DATA_BUFFERS:
# echo "262144" >; /usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS
# echo "16" >; /usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS
# cat /usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS
262144
# cat /usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS
16
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