HP OpenView Storage Mirroring User Guide (360226-002, May 2004)

10 - 10
Setting bandwidth limitations
Set the bandwidth by using the limit bandwidth command.
Setting transmission start criteria
Specify any combination of the following options to start transmitting Storage Mirroring data to the target machine.
! Specifying a Start Time—Specify a start time to begin transmitting Storage Mirroring data using the schedule start
command with the starttime switch.
! Specifying a Start Time and Repeat Interval—Specify a start time to begin transmitting Storage Mirroring data and a repeat
interval for additional transmissions by using the schedule start command with the starttime and every switches.
! Specifying Queue Usage—Specify the queue usage criteria that must be in use to trigger Storage Mirroring data
transmission. By using the
memlimit switch, you can specify the percentage of the disk queue and system memory that
must be in use to trigger transmission. By using the queuesize switch, you can specify the number of bytes that must
be in the queue to trigger transmission.
Command LIMIT BANDWIDTH
Description Sets bandwidth restrictions for transmitting data from the source to the target
Syntax
LIMIT BANDWIDTH <bytes>, <seconds> TO <target_machine>
Options ! bytes—Number of bytes to be transmitted
! seconds—Maximum number of seconds to wait before transmitting again
! target_machine—Name of the target machine
Examples
limit bandwidth 19300, 5 to jersey
Notes This command transmits in bursts, not bytes per seconds. The time identifies how long to wait
before transmitting again. For example, if 5 seconds are specified and it only takes 2 seconds to send
the specified bytes, Storage Mirroring will wait an additional 3 seconds before transmitting again.
Command SCHEDULE START
Description Sets criteria to start the transmission of data from the source to the target
Syntax
SCHEDULE <target_machine> START [STARTTIME = <mm/dd/yy> <hh:mm>] [MEMLIMIT =
<percent>]
[QUEUESIZE = <bytes>] [EVERY <number> <time_units>]
Options
! target_machine—Name of the target machine
! mm/dd/yy—Date in month/day/year format indicating when the transmission will begin
! hh:mm—Time in hour:minute format using the 24 hour clock indicating when the transmission
will begin
! percent—Any number between 0 and 100 indicating the percentage of the disk queue and system
memory that must be in use to initiate the transmission process
! bytes—Number of bytes that must be in the source queue and system memory to initiate the
transmission process
! number—Any number indicating how often the transmission process will be repeated
! time_units—Minutes (min), hours (hr), or days (day)
Examples
! schedule jersey start starttime=3/11/01 03:30
! schedule philly start queuesize=400000
! schedule jersey start starttime=3/03/01 18:00, every 8 hr
! schedule philly start memlimit=25, queuesize=150000000
Notes ! The start option EVERY cannot be used by itself and cannot be the first option in a string of
options.
! If you use more than one start option, the transmission will begin when the first start option
value is met. Additionally, each option after the first must be separated by a comma, as illustrated
in the Examples.