TWiki
>
LCG Web
>
ManagementBoard
>
Planning
>
MssEfficiency
(2009-06-29,
JonBakken
)
(raw view)
E
dit
A
ttach
P
DF
---+ MSS Efficiency Data | *Tier-0 Site* || *Last Update*| |*CERN*|MssEfficiencyCERN|20081201| | *Tier-1 Sites* || *Data Available*| |*CA-TRIUMF*|[[MssEfficiencyCA-TRIUMF][MssEfficiencyCA-TRIUMF]]| 20080623| |*DE-KIT*|[[MssEfficiencyDE-KIT][MssEfficiencyDE-KIT]]| 20080615 | |*ES-PIC*|[[MssEfficiencyES-PIC][MssEfficiencyES-PIC]]| 20080614| |*FR-CCIN2P3*|[[MssEfficiencyFR-CCIN2P3][MssEfficiencyFR-CCIN2P3]]| - | |*IT-INFN-CNAF*|[[MssEfficiencyIT-INFN-CNAF][MssEfficiencyIT-INFN-CNAF]]| 20080617| |*NDGF*|[[MssEfficiencyNDGF][MssEfficiencyNDGF]]| 20080609| |*NL-T1*|[[MssEfficiencyNL-T1][MssEfficiencyNL-T1]]| 20080623| |*TW-ASGC*|[[MssEfficiencyTW-ASGC][MssEfficiencyTW-ASGC]]| - | |*UK-T1-RAL*|[[MssEfficiencyUK-T1-RAL][MssEfficiencyUK-T1-RAL]]| 20081101| |*US-FNAL-CMS*|[[MssEfficiencyUS-FNAL-CMS][MssEfficiencyUS-FNAL-CMS]]| 20090629| |*US-T1-BNL*|[[MssEfficiencyUS-T1-BNL][MssEfficiencyUS-T1-BNL]]| 20081822| ---+ Explanation of Metrics for MSS Efficiency *1. Total Rate* - The total volume of data transferred divided by the number of seconds that a drive is occupied serving the request. This includes mounting and positioning time, data transfer time and unmounting time. It is expressed in MB/s. *2. File Size* - The average file size in MB transferred to or from the tape drive. The performance of tape drives varies according to the file size. The larger the file size, the higher the drive performance since it is able to achieve full data streaming. Smaller file sizes require the drive to stop/start more frequently, reducing performance as well as increasing wear and tear on the drives and tapes. *3. Tape Repeat Mounting* - The remounting metrics track the average number of times a tape is mounted for all of the tapes which were touched that day. When the migration and recalling strategies are working well, this should be a low number. A tape mount and positioning takes between 3 and 5 minutes and the tape drive is not being used for data transfer during this period so a large number of repeat mounting wastes potential data transfer time. For example, if 10 tapes were touched in that day. One of the tapes were mounted 5 times and the rest only once, the total mounts were: 9 + 5 = 14. So the answer is 14/10 = 1.4. So Tape Repeat Mounting is 1.4. *4. Data Transferred / Mount* - The volume of data in MB transferred on average for mounts during the day. Higher values indicate that the work for mounting is being effectively used. ---++ Site / Experiment |*Date*|*1. Total Data Rate*|| *2. Avg. File Size* || *3. Tape Repeat Mnt* || *4. Data xferred/mnt* || | |Read|Write|Read|Write|Read|Write|Read|Write| | 20080202 | x | x | x | x | x | x | x | x | | 20080209 | x | x | x | x | x | x | x | x |
Attachments
Attachments
Topic attachments
I
Attachment
History
Action
Size
Date
Who
Comment
xml
CA_TRIUMF_Tape_Metrics.xml
r3
r2
r1
manage
1.9 K
2009-05-12 - 13:41
AlbertoAimar
xml
CERN_Tape_Metrics.xml
r4
r3
r2
r1
manage
14.4 K
2009-05-28 - 17:29
AlbertoAimar
xml
DE_KIT_Tape_Metrics.xml
r7
r6
r5
r4
r3
manage
3.4 K
2009-05-28 - 10:51
AlbertoAimar
xml
ES_PIC_Tape_Metrics.xml
r2
r1
manage
1.9 K
2009-05-12 - 13:42
AlbertoAimar
xml
FR_CCIN2P3_Tape_Metrics.xml
r2
r1
manage
1.9 K
2009-05-12 - 13:42
AlbertoAimar
xml
IT_INFN_CNAF_Tape_Metrics.xml
r2
r1
manage
1.9 K
2009-05-12 - 13:42
AlbertoAimar
xml
NDGF_Tape_Metrics.xml
r2
r1
manage
1.8 K
2009-05-12 - 13:42
AlbertoAimar
xml
NL_T1_Tape_Metrics.xml
r3
r2
r1
manage
1.8 K
2009-05-12 - 13:53
AlbertoAimar
xml
TW_ASGC_Tape_Metrics.xml
r1
manage
1.9 K
2009-05-12 - 13:43
AlbertoAimar
xml
UK_T1_RAL_Tape_Metrics.xml
r2
r1
manage
1.9 K
2009-05-12 - 13:43
AlbertoAimar
xml
US_FNAL_CMS_Tape_Metrics.xml
r2
r1
manage
1.9 K
2009-05-12 - 13:43
AlbertoAimar
xml
US_T1_BNL_Tape_Metrics.xml
r6
r5
r4
r3
r2
manage
1.9 K
2009-05-12 - 13:43
AlbertoAimar
E
dit
|
A
ttach
|
Watch
|
P
rint version
|
H
istory
: r88
<
r87
<
r86
<
r85
<
r84
|
B
acklinks
|
V
iew topic
|
WYSIWYG
|
M
ore topic actions
Topic revision: r88 - 2009-06-29
-
JonBakken
Log In
LCG
LCG Wiki Home
LCG Web Home
Changes
Index
Search
LCG Wikis
LCG Service
Coordination
LCG Grid
Deployment
LCG
Apps Area
Public webs
Public webs
ABATBEA
ACPP
ADCgroup
AEGIS
AfricaMap
AgileInfrastructure
ALICE
AliceEbyE
AliceSPD
AliceSSD
AliceTOF
AliFemto
ALPHA
Altair
ArdaGrid
ASACUSA
AthenaFCalTBAna
Atlas
AtlasLBNL
AXIALPET
CAE
CALICE
CDS
CENF
CERNSearch
CLIC
Cloud
CloudServices
CMS
Controls
CTA
CvmFS
DB
DefaultWeb
DESgroup
DPHEP
DM-LHC
DSSGroup
EGEE
EgeePtf
ELFms
EMI
ETICS
FIOgroup
FlukaTeam
Frontier
Gaudi
GeneratorServices
GuidesInfo
HardwareLabs
HCC
HEPIX
ILCBDSColl
ILCTPC
IMWG
Inspire
IPv6
IT
ItCommTeam
ITCoord
ITdeptTechForum
ITDRP
ITGT
ITSDC
LAr
LCG
LCGAAWorkbook
Leade
LHCAccess
LHCAtHome
LHCb
LHCgas
LHCONE
LHCOPN
LinuxSupport
Main
Medipix
Messaging
MPGD
NA49
NA61
NA62
NTOF
Openlab
PDBService
Persistency
PESgroup
Plugins
PSAccess
PSBUpgrade
R2Eproject
RCTF
RD42
RFCond12
RFLowLevel
ROXIE
Sandbox
SocialActivities
SPI
SRMDev
SSM
Student
SuperComputing
Support
SwfCatalogue
TMVA
TOTEM
TWiki
UNOSAT
Virtualization
VOBox
WITCH
XTCA
Welcome Guest
Login
or
Register
Cern Search
TWiki Search
Google Search
LCG
All webs
Copyright &© 2008-2024 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
or Ideas, requests, problems regarding TWiki? use
Discourse
or
Send feedback