HP XP Continuous Access Software - Manual (Page 166)

01 (00) [&]). A journal group number ending in [M] indicates the journal group is in a 3DC
configuration with three Continuous Access sites (e.g., 01 (00) [M]).
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Attribute: The attribute of the journal group. When one journal group uses multiple mirror IDs,
Attribute indicates the attribute of the data volume in the journal group whose mirror ID is not
Hold, Holding, or Hold(Failure).
In the case of a master journal group, Attribute indicates Master. In the case of a restore
journal group, Attribute indicates Restore. In case of a journal group whose attribute is
master/restore, Attribute indicates Master & Restore. If Attribute indicates Initial, it means that
journal volumes are registered in this journal group, but no data volumes (primary data volumes
nor secondary data volumes) are registered in this journal group. When neither journal volumes
nor data volumes are registered, Attribute indicates nothing.
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JNL Volumes: The number of journal volumes registered in the journal group.
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JNL Capacity: The total capacity of all the registered journal volumes.
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Data Volumes: The number of data volumes associated with the journal group. When one
journal group uses multiple mirror IDs, Data Volumes indicates the number of the data volumes
in the journal group whose mirror ID is not Hold, Holding, or Hold(Failure).
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Data Capacity: The total capacity of all the data volumes. When one journal group uses
multiple mirror IDs, Data Capacity indicates the total capacity of the data volumes in the journal
group whose mirror ID is not Hold, Holding, or Hold(Failure).
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Inflow Control: The function to reduce the number of I/Os which the storage system receives
by delaying the responses to the host I/Os. This function can restrain the data overflow from
the journal volume. Inflow Control indicates whether to restrict inflow of update I/Os from a
host to the journal volume (in other words, whether to slow delay response to hosts).
Yes indicates inflow will be restricted. No indicates inflow will not be restricted. The default
setting is Yes, so that it prevents the XP Continuous Access Journal pair from suspending due
to the journal data overflowing.
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Data Overflow Watch: The time (in seconds) to monitoring the journal data area to determine
if it is full. Data Overflow Watch is blank when Inflow Control is No.
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Copy Pace: The pace for an initial copy activity for one volume.
One of the following appears: High, Medium, or Low. The default setting is Low. Copy Pace
is blank if the journal group is a restore journal group.
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Use of Cache: Indicates whether to store journal data in the restore journal group in the cache.
Use: Journal data will be stored in the cache. When there is insufficient space in the
cache, journal data will also be stored into the journal volume. ◦
◦ Not Use: Journal data will not be stored into the cache.
Caution: This setting does not take effect on master journal groups. However, if the RAID
Manager horctakeover command is used to change a master journal group into a restore
journal group, this setting takes effect on the journal group. If you set Use, this setting only
takes effect on the journal volumes of RAID 5 or RAID 6 that are in the journal group. For
external volumes, non-RAID 5 journal volumes and non-RAID 6 journal volumes Use works the
same as Not Use.
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Delta resync Failure: The processing that would take place when the delta resync operation
cannot be performed.
◦ Entire: Whole data in a primary data volume is copied to the secondary data volume
when the delta resync operation cannot be performed.
◦ None: No processing takes place when the delta resync operation cannot be performed.
Therefore, the secondary data volume will not be updated.
166 Using Journal Groups