[dbadmin@ip-10-5-5-199 ~]$ dd if=/dev/zero of=/home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp bs=1048576 count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 40.4984 s, 26.5 MB/s
[dbadmin@ip-10-5-5-199 ~]$ dd if=/dev/zero of=/home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp bs=1048576 count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 36.8472 s, 29.1 MB/s
[dbadmin@ip-10-5-5-199 ~]$ dd if=/dev/zero of=/home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp bs=1048576 count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 35.5215 s, 30.2 MB/s
[dbadmin@ip-10-5-5-199 ~]$ dd if=/dev/zero of=/home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp bs=1048576 count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 36.0814 s, 29.8 MB/s
[dbadmin@ip-10-5-5-199 ~]$ dd if=/dev/zero of=/home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp bs=1048576 count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 43.3848 s, 24.7 MB/s
[dbadmin@ip-10-5-5-199 ~]$ time cp /home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp /vertica/data/deleteme.tmp

real	0m32.582s
user	0m0.001s
sys	0m0.903s
[dbadmin@ip-10-5-5-199 ~]$ rm /vertica/data/deleteme.tmp; sudo bash -c "echo 2 > /proc/sys/vm/drop_caches"
[dbadmin@ip-10-5-5-199 ~]$ time cp /home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp /vertica/data/deleteme.tmp

real	0m30.516s
user	0m0.006s
sys	0m0.911s
[dbadmin@ip-10-5-5-199 ~]$ rm /vertica/data/deleteme.tmp; sudo bash -c "echo 2 > /proc/sys/vm/drop_caches"
[dbadmin@ip-10-5-5-199 ~]$ time cp /home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp /vertica/data/deleteme.tmp

real	0m32.134s
user	0m0.004s
sys	0m0.915s
[dbadmin@ip-10-5-5-199 ~]$ rm /vertica/data/deleteme.tmp; sudo bash -c "echo 2 > /proc/sys/vm/drop_caches"
[dbadmin@ip-10-5-5-199 ~]$ time cp /home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp /vertica/data/deleteme.tmp

real	0m29.623s
user	0m0.004s
sys	0m0.912s
[dbadmin@ip-10-5-5-199 ~]$ rm /vertica/data/deleteme.tmp; sudo bash -c "echo 2 > /proc/sys/vm/drop_caches"
[dbadmin@ip-10-5-5-199 ~]$ time cp /home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp /vertica/data/deleteme.tmp

real	0m29.675s
user	0m0.003s
sys	0m0.837s
[dbadmin@ip-10-5-5-199 ~]$ rm /vertica/data/deleteme.tmp; sudo bash -c "echo 2 > /proc/sys/vm/drop_caches"
[dbadmin@ip-10-5-5-199 ~]$ time cp /home/dbadmin/raw/input/ams/impressions/2015/10/06/deleteme.tmp /vertica/data/deleteme.tmp

real	0m32.262s
user	0m0.003s
sys	0m0.894s