PM19353; 7.0.0.9: Performance improvement in writing large EAR to disk

Download Description

PM19353 resolves the following problem:

ERROR DESCRIPTION:
Users of WebSphere Application Server V7.0.0.0 to V7.0.0.11

A significant bottleneck during application deployment for large EAR files occurs when data is read from the input stream into a file on disk one byte at a time, instead of employing a larger and more efficient buffer.

LOCAL FIX:

PROBLEM SUMMARY

USERS AFFECTED:
All Users of IBM WebSphere Application Server v7.

PROBLEM DESCRIPTION:
A significant bottleneck during application deployment with very large EAR files occurs when data is read from the input stream into a file on disk one byte at a time, instead of employing a larger and more efficient buffer.

RECOMMENDATION:
None

When deploying applications with significantly large EAR files, writing of the EAR file to disk may take a substantial amount of the overall deployment time. Metrics show that the performance may improve by employing a byte buffer in the write operation, thus reducing the overall deployment time.

PROBLEM CONCLUSION:
The code is changed to improve the performance in writing EAR files to disk by using a byte buffer. The performance improvement is most notable when deploying very large application files.

The fix for this APAR is currently targeted for inclusion in fix pack 7.0.0.13. Please refer to the Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980