[infinispan-issues] [JBoss JIRA] (ISPN-3877) Disk Space optimizations for SingleFileStore

Disk Space optimizations for SingleFileStore -------------------------------------------- Key: ISPN-3877 URL: https://issues.jboss.org/browse/ISPN-3877 Project: Infinispan Issue Type: Patch Components: Loaders and Stores Affects Versions: 6.0.0.Final Environment: Oracle JDK 1.7, Windows Server 2008 R2 x64 Reporter: Rajesh Jangam Assignee: Mircea Markus We are testing the latest Infinispan 6.0 SingleFileStore version for our application. We tend to create a lot of entries in the store and remove them when not required. However, what we have observed is that the size of the file keeps on increasing as more data is being added/removed and that it does not get reclaimed. This was not seen with earlier versions like 5.3.0. There the size of the cache folder would reduce as entries got removed. We have attempted to create a fix for this issue and tested it in our environment. It keeps the space usage under control as compared to the original implementation. The proposed fix is twofold: 1. Truncates the file if there are free fileentries at the end of the data file. 2. Coalesces consecutive free fileentries into one so that the probability of finding a free file entry capable enough to contain a newly added key-value pair increases. Please review this diff and let us know your opinion