12/27/2022 0 Comments 3par copy spaceSnapshot data (SD) LDs provide the storage space for snapshots (or virtual copies). This means space calculation is much more intuitive, there are lower overheads for garbage collection, backend writes etc and the DDS provides much higher scalability since it only contains shared data. User (USR) LDs provide user storage space to fully provisioned VVs. #3par copy space update#Update - A good overview of some of the changes in the ink below, the new code places all unique data into the DDC first and only subsequent shared data into the DDS rather than the previous first come first served model. showblock show block mapping info for vvs, lds, pds. showbattery show battery status information. This may have been necessary when first setup and a single sync involved multiple terabytes of backlogs, but we are currently running on 15 minute sync cycles and. Each of them has a 'reserved copy space' of > 50, leading to several 'reserved' terabytes of storage. showauthparam show authentication parameters. Josh26 wrote: Hey guys, I have a number of 2TB LUNs participating in RC groups. As mentioned above this should be resolved in the 3.3.1 release as the new structures and the change in how this is presented make this all very much more intuitive. HPE 3PAR Commands & Basic Function: showalert show status of system alerts. Unfortunately this is made worse because some of the intricacies of dedupe are hidden to simplify things, namely the DDS and host written numbers. However overall consumed space is not and should be measured at the CPG rather than the VV as this takes into account the real consumed space. However you will want to run compactcpg first before attempting compactld to make the most out of it.The numbers today at the volume level can be misleading the reason being they are load factored because multiple TDVV volumes share DDS space, so how much belongs to each volume at anyone time is a bit of an estimate. Or time for your system admins to do 'spring cleaning' of their systems. It can continue to grow another 3,540 GiB. Someone set the system to let you know when the CPG exceeds 12,288 GiB. This document is for all levels of system and storage administrators who plan, build, and manage HPE 3PAR Remote Copy system configurations. Re: 3PAR CPG Issue - Copy Space At Warning Level You do have a Growth Warning set. Incedently, there is also a compactld command in the form of compactld or compactld -pat which behaves in largely the same way, but on the Logical Disk layer. This document explains the concepts, terminology, and fundamentals of HPE 3PAR Remote Copy. That is, the physical disks are physically balanced accross the cages, the chunklets are evenly spread accross the physical disks, the logical disks are balanced accross the pool of available chunklets, and so on. The 3PAR actually uses five logical data layers:īalancing occurs on each of these layers. With regards to your question on balancing the chunklets, this is handled automatically by the 3PAR. More information on this can be found here. This means it can take a few hours or even days for the array to fully reclaim all of the newly freed up space. The other thing to note is that compactcpg is always run as a low priority task so as to not disrupt regular IO operations. Or you can manually kick the process off via the 3PAR CLI using the command above. The process itself is automatically run by the 3PAR at regular intervals, so you can wait and the space will eventually be reclaimed by the 3PAR. This post covers the procedure using SSMC, if you wish to read some more background on Remote Copy and using the 3PAR management console check out this previous post. If you fancy writing a guest post check out this post. The form you will want to use is compactcpg or compactcpg Today we have a highly detailed guest post written by Deepak Garg covering the 3PAR remote copy failover and recovery process. Actually, compactcpg is the correct command to use in this case.
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