Adding clean-up code to cluster.py to remove empty directories and zero-length files in the log directory
Adding clean-up code to cluster.py to remove empty directories and zero-length files in the log directory

QingkaiLu/RAMCloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,QingkaiLu/RAMCloud,alexandermerritt/ramcloud,anirajk/RAMCloud,utah-scs/RAMCloud,SMatsushi/RAMCloud,rstutsman/RAMCloud,alexandermerritt/ramcloud,utah-scs/RAMCloud,SMatsushi/RAMCloud,jblomer/ramcloud,anirajk/RAMCloud,matrix207/RAMCloud,jblomer/ramcloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,matrix207/RAMCloud,QingkaiLu/RAMCloud,utah-scs/RAMCloud,jblomer/ramcloud,QingkaiLu/RAMCloud,SMatsushi/RAMCloud,matrix207/RAMCloud,rstutsman/RAMCloud,anirajk/RAMCloud,QingkaiLu/RAMCloud,QingkaiLu/RAMCloud,rstutsman/RAMCloud,SMatsushi/RAMCloud,rstutsman/RAMCloud,utah-scs/RAMCloud,anirajk/RAMCloud,anirajk/RAMCloud,matrix207/RAMCloud,anirajk/RAMCloud,alexandermerritt/ramcloud,matrix207/RAMCloud,jblomer/ramcloud,alexandermerritt/ramcloud,SMatsushi/RAMCloud,jblomer/ramcloud,rstutsman/RAMCloud,matrix207/RAMCloud,SMatsushi/RAMCloud,jblomer/ramcloud,rstutsman/RAMCloud