IBM System Storage Ideas Portal


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Status Planned for future release
Workspace IBM DS8000
Created by Guest
Created on Apr 22, 2021

RELATED IDEAS

Increase the DS8000 TCT throughput per dataset

Customer is using DS8K TCT with HSM in mainframe to have a 3rd copy of data in the IBM Cloud (COS).
They are using 3 DS8K boxes and the total throughput they can achieve is not enough to send the data generated in the last 24h every day.
The limitation comes from :
R9.0.x code has a limitation of 6 threads per CEC. Determination of which CEC will use the threads is based on the source or target LCU (odd and even LCUs to go different CECs).
In R9.1, we increased the number of threads per CEC from 6 to 20 via CMVC 344422.
Future enhancements to partition each file when sending it to the cloud and thus increase the transfer speed per file have no target date yet.
Even with CMVC 344422 they will not have enough throughput as some datasets are very big and they have a limit of 50Mbps per dataset.
Migration vs. Recall:
1. Currently, migration is limited to a single thread per dataset.
2. Recall, however, has the capability to recall the dataset in parallel with multiple threads per dataset. This is in addition to the 6/20 tasks
So we'd like that migrations could also work similar ro recall.
that can. be done in parallel per CEC.

Idea priority High

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