ISILON hdfs - fs.trash.interval? How does the trash cleaninig up process work on ISILON HDFS

Does ISILON hdfs has some configuration files of ite own or does it work out of core-site.xml or core-default.xml?

I do not see on ISILON hdfs

/user/XYZ/.Trash/Current not getting deleted.

Any insight into this process.

Thanks for your help and input.

Ashok