HP Command View EVA Software - Manual (Page 98)

HSV200, and HSV300 controller series, and as FP1, FP2, FP3, and FP4 for the HSV210 and
HSV340 series onwards.
The counters are:
•
Round Trip Delay —The average time, in milliseconds, for a signal (ping) to travel from
the source to the destination and back. In replication traffic, the signal is queued behind data
transmissions, which increases the round trip delay. If the destination controller is busy, the
value also increases. Round trip delay is reported for all active tunnels.
•
Copy Retries —The number of copies from the source storage system that were retransmitted
due to a failed copy transmission. Each retry creates a 128-KB copy. Retries are reported by
both the source and destination storage systems.
•
Write Retries —The number of writes from the source storage system that were retransmitted
due to a failed write to the destination storage system. Each retry creates an 8-KB copy. If the
write contains multiple 8-KB segments, only the failed segments are retransmitted. Retries are
reported by both the source and destination storage systems.
•
Copy In MB/s —The rate at which data is copied to a storage system to populate the
members of a DR group with data when an initial copy or full copy is requested.
•
Copy Out MB/s —The rate at which data is copied from a storage system to populate the
members of a DR group with data when an initial copy or full copy is requested.
•
Write In MB/s —The rate at which data is written to a storage system because of write
activity to the members of the source storage system. The write activity includes host writes,
merges, and replication retries. A merge is an action initiated by the source storage system
to write new host data that has been received and logged while a replication write to the
destination storage system was interrupted, and now has been restored.
•
Write Out MB/s —The rate at which data is written from a storage system because of write
activity to the members of the source storage system. The write activity includes host writes,
merges, and replication retries.
•
Free Write Resources —The minimum number of free resources available for DR write
operations.
•
Free Copy Resources —The minimum number of free resources available for DR copy
operations.
•
Free Command Resources —The minimum number of free resources available for DR
command operations.
HP EVA DR Group Information
The EVA DR Group Information object provides information about the performance of the DR Group
Write History Log (WHL) files. The performance metrics are provided for each DR group. The WHL
fill and drain rates can be displayed in either MBs or KBs.
Creation and management of DR groups is not supported by HP P6000 Command View array-based
management.
The counters are:
•
Log full percentage —An instantaneous value representing the percentage of the log
disk which is used, in tenths of a percent. For example, 1000 is equal to 100 percent, and
10 is equal to 1 percent.
•
Log fill Req/s —The rate at which requests to put data into the log disk owned by this
DRM group come in
•
Log fill KB/s —The rate at which data is put into the log disk owned by this DRM group.
98 Monitoring array performance using HP P6000 Performance Data Collector