[infinispan-dev] Cache.size() on distributed caches?

[Radim Vansa]

I don't think RadarGun is much related to that, besides the fact that it 
can be buggy :)

The question is whether the cache.size() behaviour has changed in a way 
that i would report full cache size, not just the size of container/the 
size of cache store?

Radim

On 07/25/2014 03:54 PM, Alan Field wrote:
> Hey,
>
> I have been looking at adding the ability to get the total size of a cache in RadarGun. The first implementation I coded used the distributed iterators in Infinispan 7.[1] I then realized that implementing getTotalSize() method using a distributed executor would allow the code in versions back to Infinispan 5.2. I have the code written, and I have been running some Jenkins jobs with Infinispan 6.0.1 Final to verify that the results are correct.[2] I use the RandomData stage to put data in the cache. Here is what it writes in the log:
>
> 04:11:59,573 INFO  [org.radargun.stages.cache.RandomDataStage] (main) Received responses from all 4 slaves. Durations [0 = 17.04 minutes, 1 = 18.36 minutes, 2 = 18.44 minutes, 3 = 18.58 minutes]
> 04:11:59,574 INFO  [org.radargun.stages.cache.RandomDataStage] (main) --------------------
> 04:11:59,574 INFO  [org.radargun.stages.cache.RandomDataStage] (main) Filled cache with String objects totaling 25% of the Java heap
> 04:11:59,574 INFO  [org.radargun.stages.cache.RandomDataStage] (main) Slave 0 wrote 479352 values to the cache with a total size of 958,704 kb; targetMemoryUse = 1,022,368 kb; countOfWordsInData = 44900952
> 04:11:59,575 INFO  [org.radargun.stages.cache.RandomDataStage] (main) Slave 1 wrote 479352 values to the cache with a total size of 958,704 kb; targetMemoryUse = 1,022,368 kb; countOfWordsInData = 44914319
> 04:11:59,575 INFO  [org.radargun.stages.cache.RandomDataStage] (main) Slave 2 wrote 479352 values to the cache with a total size of 958,704 kb; targetMemoryUse = 1,022,368 kb; countOfWordsInData = 44906729
> 04:11:59,575 INFO  [org.radargun.stages.cache.RandomDataStage] (main) Slave 3 wrote 479352 values to the cache with a total size of 958,704 kb; targetMemoryUse = 1,022,368 kb; countOfWordsInData = 44908687
> 04:11:59,576 INFO  [org.radargun.stages.cache.RandomDataStage] (main) The cache contains 1917408 values with a total size of 3,834,816 kb
> 04:11:59,576 INFO  [org.radargun.stages.cache.RandomDataStage] (main) 100 words were generated with a maximum length of 20 characters
> 04:11:59,576 INFO  [org.radargun.stages.cache.RandomDataStage] (main) --------------------
>
> These are the outputs from my getTotalSize() code:
>
> 04:11:59,591 INFO  [org.radargun.service.Infinispan53CacheInfo] (main) org.radargun.service.Infinispan53CacheInfo$Cache.getTotalSize() for cache testCache
> 04:12:12,094 INFO  [org.radargun.service.Infinispan53CacheInfo] (main) cache.size() = 1917408
> 04:12:26,283 INFO  [org.radargun.service.Infinispan53CacheInfo] (main) cache.getAdvancedCache().size() = 1917408
> 04:12:26,283 INFO  [org.radargun.service.Infinispan53CacheInfo] (main) cache.getAdvancedCache().getCacheConfiguration().clustering().hash().numOwners() = 2
> 04:12:26,283 INFO  [org.radargun.service.Infinispan53CacheInfo] (main) cache.getCacheManager().getMembers().size() = 4
> 04:12:41,955 INFO  [org.radargun.stages.cache.ClearCacheStage] (main) Cache size = 3834800
>
> The "Cache size =" message is from the results of my distributed executor, and the other messages are informational. These outputs show that calling cache size on a distributed cache returns the size of the entire cache including any passivated entries, not just the size of the cache on the local node. This breaks the code of my distributed executor, but mostly makes it unnecessary if I can just call cache.size().
>
> Is this an expected change in behavior?
>
> Thanks,
> Alan
>
> [1] https://github.com/radargun/radargun/blob/master/plugins/infinispan70/src/main/java/org/radargun/service/Infinispan70CacheInfo.java#L39
> [2] https://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/jdg-radargun-gettotalcachesize-test/6
>


-- 
Radim Vansa <rvansa at redhat.com>
JBoss DataGrid QA