--
JamieShiers - 19 Apr 2006
SC4 Disk - Tape Transfer Targets
The disk - tape Tier0 -> Tier1 transfer targets for the SC4 disk - tape throughput phase are:
- 75MB/s per Tier1 site or
- 60MB/s for PIC as per disk - disk target
- 50MB/s for those sites (NDGF, TRIUMF) that have this as their full nominal rate
These are significantly lower than the full nominal rates that sites will later have to support, reduced in order to reflect the current tape technology and infrastructure that is installed.
Full nominal rate tests are officially scheduled for July - to be reviewed based on site acquisition and installation plans as provided to the LCG MB, and on experience with repeated disk - disk tests. (We need to be able to regularly and rapidly achieve disk - disk transfers at or above full nominal).
Reported Daily Average Rates to Tape
- The site by site reports are also summarised in a table below.
CNAF
Estimated Overall Rate to Tape (from Tue Apr 19 to Thu Apr 27): 76.94 MB/s
Estimated Daily Rate to Tape (MB/s):
Date |
Rate |
Wed 19 |
5.32 MB/s |
Thu 20 |
103.80 MB/s |
Fri 21 |
148.00 MB/s |
Sat 22 |
25.46 MB/s |
Sun 23 |
11.60 MB/s |
Mon 24 |
62.50 MB/s |
Tue 25 |
62.50 MB/s |
Wed 26 |
91.34 MB/s |
Thu 27 |
182.00 MB/s |
SARA
Date |
Rate |
19-4 |
12 MB/s |
20-4 |
35 MB/s |
21-4 |
30 MB/s |
22-4 |
36 MB/s |
23-4 |
14 MB/s |
24-4 |
23 MB/s |
25-4 |
39 MB/s |
BNL
See summary plots
here
.
The following is the plot of BNL's tape transfer rate:
CNAF
CNAF has switched to tape testing on Apr 19 at 6 p.m. So far, we downloaded 18 TB, which gives an average rate to tape - over approx. 47 hours - of 106 MB/s
Update (Apr 28): Estimated Overall Rate to Tape (from Tue Apr 19 to Thu Apr 27): 76.94 MB/s
(6 tape drives in use)
Monitoring pages for migration to tape with Castor2 still under implementation.
Detailed daily averages in table at the bottom of this page.
TRIUMF
Available
here
.
Day |
#files |
seconds |
MB/sec |
Wed |
1283 |
31080 |
41.28 |
Thu |
2530 |
86400 |
29.28 |
Date |
# files |
Data |
net MB/sec |
atl MB/sec/drive |
Writes/mount |
21/04/06 |
3454 |
3454000 |
39.97685 |
29.7 |
5.2 |
22/04/06 |
2569 |
2569000 |
29.7338 |
36.15 |
4.2 |
23/04/06 |
1377 |
1377000 |
15.9375 |
38.5 |
7.9 |
USCMS
For USCMS: All times based on Chicago days.
Wed 4/19: 105 MB/s accepted from CERN
105 MB/s written to tape
for 15.5hrs duration
Thu 4/20: 115 MB/s accepted from CERN
100 MB/s written to tape
STK silo down for repair for several hours - data buffered
Fri 4/21: 90 MB/s accepted from CERN for 14 hrs.
115 MB/s written to tape (buffered data from previous day)
Sat 4/22: Cooling outage
Sun 4/23: Cooling outage
Mon 4/24: 115 MB/s accepted from CERN and written to tape, over 17 hours
Tue 4/25: 80 MB/s accepted from CERN and written to tape
Site |
Apr19 |
Apr20 |
Apr21 |
Apr22 |
Apr23 |
Apr24 |
Apr25 |
Apr26 |
Apr27 |
ASGC |
disk |
disk |
|
|
|
|
BNL |
- |
- |
- |
- |
- |
- |
FNAL |
105 |
100 |
115 |
- |
- |
115 |
80 |
TRIUMF |
25 |
17 |
- |
- |
- |
- |
IN2P3 |
89 |
80 |
74 |
85 |
100 |
93 |
60 |
90 |
FZK |
disk |
disk |
|
|
|
|
CNAF |
5.32 |
103.80 |
148.00 |
25.46 |
11.60 |
62.50 |
62.50 |
91.34 |
182.00 |
RAL |
41 |
29 |
- |
- |
- |
- |
SARA |
- |
- |
- |
- |
- |
- |
PIC |
- |
- |
- |
- |
- |
- |
NDGF |
- |
- |
- |
- |
- |
- |
Site Monitoring
Site |
Apr19 |
Apr20 |
Apr21 |
Apr22 |
Apr23 |
Apr24 |
Apr25 |
Comments |
BNL |
106 |
36 |
40 |
91 |
90 |
90 |
64 |
- |
FNAL |
156 |
115 |
68 |
- |
- |
62 |
80 |
(Maintenance over weekend) |
TRIUMF |
47 |
14 |
10 |
30 |
38 |
41 |
45 |
- |
IN2P3 |
113 |
79 |
71 |
88 |
98 |
93 |
92 |
- |
CNAF |
101 |
73 |
56 |
8 |
- |
42 |
7 |
- |
RAL |
80 |
42 |
24 |
30 |
16 |
31 |
20 |
- |
SARA |
68 |
37 |
24 |
40 |
- |
26 |
43 |
- |
PIC |
39 |
17 |
24 |
23 |
50 |
20 |
48 |
- |
NDGF |
54 |
56 |
47 |
44 |
- |
- |
- |
- |