IBM System Storage DS3000, Руководство по программированию

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You can use any combination of alphanumeric characters, underscore (
_
), hyphen (
-
), and pound (
#
) for
the names. Names can have a maximum of 30 characters.
The Enhanced FlashCopy images in a consistency group can be deduced based on the existence of an
Enhanced FlashCopy image within a consistency group. All Enhanced FlashCopy images that reside
within a consistency group share a common time stamp and sequence number.
An operation on an Enhanced FlashCopy image consistency group is treated as a single request, and
causes all pending I/O operations to the associated base logical drive of each member to be drained and
suspended before creating the Enhanced FlashCopy images. If creation of the Enhanced FlashCopy
images cannot be completed successfully for all of the consistency group members, the operation fails
and has no affect (that is, new Enhanced FlashCopy images are not created).
Based on this behavior all members for a consistency group usually have the same number of Enhanced
FlashCopy images. However, when a new member is added to a consistency group, that new member
lacks the Enhanced FlashCopy images that were previously created on the established members of the
consistency group. This is not considered an error condition. Ensuing requests for deletion or rollback of
Enhanced FlashCopy images that only exist on a subset of the consistency group members will only
affect the members for which the specified Enhanced FlashCopy images actually exists
Scheduling Enhanced FlashCopy Images in a Consistency Group
The
enableSchedule
parameter and the
schedule
parameter provide a way for you to schedule automatic
FlashCopies . Using these parameters, you can schedule Enhanced FlashCopies daily, weekly, or monthly
(by day or by date). The
enableSchedule
parameter turns on or turns off the ability to schedule Enhanced
FlashCopies. When you enable scheduling, you use the
schedule
parameter to define when you want the
Enhanced FlashCopies to occur.
This list explains how to use the options for the schedule parameter:
v immediate
- As soon as you enter the command, an Enhanced FlashCopy logical drive is created and a
copy-on-write operation begins.
v startDate
- A specific date on which you want to create an Enhanced FlashCopy logical drive and
perform a copy-on-write operation. The format for entering the date is MM:DD:YY. If you do not
provide a start date, the current date is used. An example of this option is
startDate=06:27:11 .
v scheduleDay
- A day of the week on which you want to create an Enhanced FlashCopy logical drive
and perform a copy-on-write operation. The values that you can enter are:
monday
,
tuesday
,
wednesday
,
thursday
,
friday
,
saturday
,
sunday
. An example of this option is
scheduleDay=wednesday
.
v startTime
- The time of a day that you want to create an Enhanced FlashCopy logical drive and start
performing a copy-on-write operation. The format for entering the time is HH:MM, where HH is the
hour and MM is the minute past the hour. Use a 24-hour clock. For example, 2:00 in the afternoon is
14:00. An example of this option is
startTime=14:27
v scheduleInterval
- An amount of time, in minutes, that you want to have as a minimum between
copy-on-write operation. It is possible for you to create a schedule in which you have overlapping
copy-on-write operations because of the duration a copy operation. You can make sure that you have
time between copy-on-write operations by using this option. The maximum value for the
scheduleInterval option is 1440 minutes. An example of this option is scheduleInterval=180 .
v endDate
- A specific date on which you want to stop creating an Enhanced FlashCopy logical drive and
end the copy-on-write operations. The format for entering the date is MM:DD:YY. An example of this
option is
endDate=11:26:11
.
v timesPerDay
- The number of times that you want the schedule to run in a day. An example of this
option is
timesPerDay=4
.
v timeZone
- Use this parameter to define the time zone in which the storage subsystem is operating. You
can define the time zone in one of two ways:
Chapter 3. Script Commands
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