in memory ckpt prototype
< Summary >
========================================
processes : 2560
app processes : 2400
head processes : 160
GB per process : 0.666667
GB total : 1599.999994
========================================
1510760259.363272 : [IN MEM CKPT] [APP#1] ckpt in mem of 1599.999994 GB took: 3.944182 seconds
1510760283.463848 : [FLUSH PFS] [HEAD#0] flushing 1599.999994 GB to PFS took: 27.934567 seconds
< Summary >
========================================
processes : 2400
app processes : 1800
head processes : 600
GB per process : 1.111111
GB total : 1999.999988
========================================
1510779845.183272 : [IN MEM CKPT] [APP#1] ckpt in mem of 1999.999988 GB took: 1.386995 seconds
1510779957.503907 : [FLUSH SSD] [HEAD#0] flushing 1999.999988 GB to SSDs took: 113.697267 seconds