Hi,

I noticed same situation.

I checked 3 of Recoverpoint intalled site and found same thing.

The journal size displayed using with get_group_statistics are different from their original size and it depend upon their setting status.

On legacy CG's, it display 33.95GB, but on distributed CG's, 30.78GB with 50GB of real journal volume size.

I tried to find reason or correct command but failed.

I searched Powerlink documents but there's not enough materials about journal mechanism.

Are there any document such like 'Journal Inside' ?

Hi Niv,

Here is the statistics for the group but it's a different group. For this group also I have same problem. I assigned 3.05 TB but sees only 1.09 TB on CLI. I also asked customer service for this and they said I will have to disable and enable the group to see the increased space in CLI. But disabling the group will lose all the data on Journal and I can't afford that. Also all other setting I have kept default like Logged writes propertion 20% and Journal size limet 1200 GB. Initially I thought the problem is the Journal size limit as it is only 1200 GB. But in other group even with Journal size limet 1200 GB, I can see the total journal 1.64 TB on CLI.

get_group_statistics -

     Journal:

        Usage: 1.09 TB

        Total: 1.09 TB

get_group_volumes -

     Journal volumes:

         SAN Info:

             721.44 GB  EMC Symmetrix  DEV ID: 011F

            721.44 GB  EMC Symmetrix  DEV ID: 00FA

            721.44 GB  EMC Symmetrix  DEV ID: 0148

           240.48 GB  EMC Symmetrix  DEV ID: 0158

           480.96 GB  EMC Symmetrix  DEV ID: 015B

           240.48 GB  EMC Symmetrix  DEV ID: 015D

get_group_settings -

      Logged writes propertion: 20.00%

      Journal size limit : 1.17 TB

Please let me know if you find anything about this.

Thank you.

Min-Seok Oh,

You don't have any problem as you will always see the 70% of the total journal space in the CLI as it uses 20% in Logged Write Propertion. This value is by default if you didn't chage it manually. And I am not quite sure where it uses rest 10%.

But it's normal if you are seeing 70% of the total space in CLI. My problem is for some reason it's not even seeing the 50% of the total journal I have assigned. That is also for some groups only. All other groups have 70% of the total journal I have assigned. And that's normal.

Thank you.

Nirav Patel

Hi,

Thank you for your answer.

But I saw below from 'RecoverPoint Implementation workshop'  by EMC Education.

"By default, 20% of the journal's capacity is dedicated to the image access log used during Logged access, another 5% of the journal's capacity is dedicated to the calculation of indexes that are used for Virtual access, and an additional 1GB is dedicated to handling bursts distribution. This means that only 75% of the journal is available for the storage of snapshots. When snapshot consolidation is enabled, the consolidation process uses 25% of the remaining 75%. Therefore, for consolidation to occur, 25% of 75% of the journal must be free (must not contain snapshots)."

So, I expected 75% of snapshot space from total journal size but found less than 70% usable snapshop space on all CG's.

This is the reason why I asked.

Thank you,

                                             Oh, Min-Seok

Niv,

Logically as you have explained looks correct. But to check the matter I added one more 240 GB Journal volume to the group.

Now it should be 240*7 = 1680 GB.

75% of 1680 GB will be 1260 GB.

But when I checked on the CLI, it hasn't change anything. It still shows 1.09 TB only as it was showing before.

Only solution, I can think of is disable and enable the group. That was the last option I tried and now I am getting 70% total journal space.

But I lost the previous journal space.

Also can we use thin devices for journal volume?

Thank you for the help.

Nirav

Nope. you must not use thin LUN as journal volume.

                        Oh, Min-Seok