1. STATUS OF DCACHE N2N AND MONITORING REPORT I

2. CURRENT SITUATION xrootd4j is a part of dCache implemented in such a way that each change requires new dCache version xrootd4j for dCache versions 1.9.12.15+ and 2.2+ have different interfaces for authentication and authorization plugins. N2N Two versions available. Tested and working. dCache version 1.9.12.21 is needed if simultaneous N2N and authentication are required. When given PFN it is transparent. To use gFLNs two pre-requisites: Variable $LFC_HOST to be defined and pointed appropriately Have ATLAS certificate proxy. Documented here: https://twiki.cern.ch/twiki/bin/view/Atlas/AtlasXrootdSystems#Configurating_dCache_Xrootd_door https://twiki.cern.ch/twiki/bin/view/Atlas/AtlasXrootdSystems#Configurating_dCache_Xrootd_door

3. CURRENT SITUATION Monitoring There is a program that once a minute queries dCache billing DB, makes UDP packets in the xrootd format and sends them to collector. Due to very low overlap of information collected from dCache and xrootd only two variables are sent: in and out traffic. Installed and working at MWT2 and AGLT2

4. FUTURE PLANS I Xrootd4j itself will become a plugin for dCache, thus enabling easier updates and independence from underlying dCache version. This will require new versions of dCache (1.9.12.22, 2.2.xxx, 2.4)

5. FUTURE PLANS II N2N There will be just one version of N2N. Already written and unofficially tested Monitoring We get access to most of messages between xrootd client and xrootd4j dCache server. Consequences of this approach: No need for a billing DB and extra process mining it. Gives us a lot of freedom. And we’ll need it. Makes us responsible for it’s performance Need to completely understand xrootd protocol Need to understand what part of it dCache supports Leaves us open to protocol changes Will take me some serious time to write it – week or two

6. FUTURE PLANS III We should get – hopefully this week a CERN based no- authentication needed copy of LFC to be used by European sites. Expectation is that no changes in N2N will be needed. We should test WebDAV read-only access to LFC Will need new versions of both N2N versions (C++ and Java)

7. RESERVE

8. EVENTS BASED Package version: 1.0 Connect event conn id (generated by server) host ip [client version] [protocol] File open event conn id filename file id (generated by server) size mode (r/w) File close event conn id file id bytes read/written [read ops, Vector read ops, write ops ] Disconnect event conn id Connection duration [optional] Events sends it’s info immediately. Collector does: dns lookups (host,client) joins info using connID, fileID

9. TIMER BASED EVENTS ( ~ ONCE A MINUTE) Package version: 1.0 Server version: 1.9.2.xxx Server ip Total bytes read and written Current number of connections Number of connection attempts in last period Number of successful connections in last period List of fileIDs of all currently active files and bytes transferred to/from them.

10. OVERLAP select protocol, isnew, transfersize, connectiontime from billinginfo; protocol | isnew | transfersize | connectiontime ----------+-------+------------+--------------+--- GFtp-1.0 | t | 2698 | 9 GFtp-1.0 | f | 104947 | 46 DCap-3.0 | f | 1770433189 | 228510 DCap-3.0 | f | 2000000 | 646 DCap-3.0 | f | 1234854377 | 141918 DCap-3.0 | f | 4327366566 | 500198 DCap-3.0 | f | 1781785249 | 171788 GFtp-1.0 | t | 82160365 | 6769

11. DETAILS DCACHE 1 \d billinginfo Column | Type | ----------------+-----------------------------+----------- datestamp | timestamp without time zone | 2012-07-03 17:52:01.578 useless cellname | character varying | msufs10_4@msufs10Domain useless action | character varying | transfer useless - always transfer transaction | character varying | pool:msufs10_4@msufs10Domain:1341352321578-1901596 useless pnfsid | character varying | 00005D39999EFE644ABBB4E1DBBE1D4AA61F useless fullsize | numeric | 1208435588 transfersize | numeric | 5435588 storageclass | character varying | usatlas:aglt2@osm useless isnew | boolean | f - read/write client | character varying | 192.41.236.158 - useless connectiontime | numeric | 17100 errorcode | numeric | 0 errormessage | character varying | '' protocol | character varying | DCap-3.0 initiator | character varying | door:DCap-umfs03- -2814749@dcap-umfs03Domain:1341352304449-4694621 useless

12. DETAILS DCACHE 2 \d doorinfo Table "public.doorinfo" Column | Type | Modifiers ----------------+-----------------------------+----------- datestamp | timestamp without time zone | 2012-03-13 05:05:03.682 cellname | character varying | DCap-msufs11- -38548@dcap-msufs11Domain action | character varying | request owner | character varying | /DC=org/DC=doegrids/OU=People/CN=Edward Diehl 382381 or unknown mappeduid | numeric | 834083 or -1 mappedgid | numeric | 834083 or -1 client | character varying | unknown transaction | character varying | door:DCap-umfs01- -65599@dcap-umfs01Domain:1331629506050-188335 pnfsid | character varying | 000093FC61A0929488492871F651FC7E90E connectiontime | numeric | 2256 queuedtime | numeric | 0 errorcode | numeric | 0 errormessage | character varying | '' path | character varying | /pnfs/aglt2.org/atlashotdisk/cond10_data/000021/lar/cond10_data.000021.lar.COND/cond10_data.000021.lar.COND._0008.pool.ro ot