1. SRM Monitoring 12 th April 2007 Mirco Ciriello INFN-Pisa

2. GSSD Meeting 12 April 20072 Overview Analysis of existing monitor tools for the various SRM implementations List of a first set of information that can be extracted from current available monitor tools For now only DPM and dCache are analyzed Analysis of dCache needs more investigations

3. GSSD Meeting 12 April 20073 DPM Existing Tool www.pi.infn.it/~ciriello/report_dpm.pdf There are two tools to monitor an istance of DPM dpm_qryconf: displays the Disk Pool Manager configuration dpns_getacl: gets the Access Control List associated with a DPNS directory/file

4. GSSD Meeting 12 April 20074 dpm_qryconf 1/3 Gives information for each pool: The pool name; The default amount of space reserved for a file; The threshold (in %) at which the garbage collector is started; The threshold (in %) at which the garbage collector is stopped; The default lifetime; The default pin time; The maximum lifetime; The maximum pin time;

5. GSSD Meeting 12 April 20075 dpm_qryconf 2/3 The File System Selection policy name; The Garbage Collection policy name; The Request Selection policy name; The group id if pool is restricted; The space type: V (for Volatile), D (for Durable), P (for Permanent); The Migration Policy name; The Retention policy: R (for Replica), O (for Output), C (for Custodial); The capacity of the disk pool; The amount of free space of the disk pool;

6. GSSD Meeting 12 April 20076 dpm_qryconf 3/3 There is also information on the filesystems belonging to the pool: The server name; The filesystem name; The capacity; The amount of free space; The filesystem’s status.

7. GSSD Meeting 12 April 20077 dpns_getacl 1/4 Gets the ACL associated with a DPNS directory/file For each path it displays:  The file name;  Owner;  The group;  The Access Control List (ACL) if present.

8. GSSD Meeting 12 April 20078 dpns_getacl 2/4 The output looks like #file: filename #owner: username #group: groupname user::perm user:uid:perm group::perm group:gid:perm mask:perm other:perm default:user::perm default:user:uid:perm default:group::perm default:group:gid:perm default:mask:perm default:other:perm

9. GSSD Meeting 12 April 20079 dpns_getacl 3/4 The first user entry gives permissions granted to the owner The following user entry shows the permissions granted to specific user The first group entry gives permissions granted to the owner The following group entry shows the permissions granted to specific group

10. GSSD Meeting 12 April 200710 dpns_getacl 4/4 The mask entry is the maximum permission granted to specific users or groups Default entries associated with a directory are inherited as access ACL by the files or sub-directories created in that directory

11. GSSD Meeting 12 April 200711 DPM: other useful information There is other useful information to know At the moment there’s no tool for retrieval Statistics on the performance Information about the protocol available to access/transport files

12. GSSD Meeting 12 April 200712 DPM Performace’s Information Amount of reserved space; Number of transfers for each file; Number of requests for each file; Number of requests processed; Number of movements on each pool; Number of active users; Number of files per VO; Max accessibility latency.

13. GSSD Meeting 12 April 200713 DPM Access protocol’s Information Type of access protocol; Network endpoint of the protocol; Protocol version; Function supported by the protocol.

14. GSSD Meeting 12 April 200714 dCache Existing Tool The following analysis needs further investigations For now I only list some tools: Every dCache has a status web page running on port 2288, that gives useful information about the PoolManager configuration Every dCache has a ssh administration interface, that allows the admin to log into dCache, study the components and make real-time changes to the configuration The new component SRM-watch, provides a detailed graphical view of the current and past SRM transfers to and from the dCache

15. GSSD Meeting 12 April 200715 dCache status web-page Very useful for someone running a dCache Unfortunately the information are not in machine readable format We can recover information on:  Availability and response times of pools;  Pool Space Usage (total, used, cached, sticky);  Pool selection scheme;  Data Transfer Queue from Tapes to disks;  Mover queues per pool;  List of active transfers;  Daily, weekly transfer and repository statistics.

16. GSSD Meeting 12 April 200716 dCache ssh admin interface It is accessible with the SSH protocol Provides a more detailed view than webpage Unfortunately, it is difficult to write scripts for this interface Useful commands are “info” for general information and ”show pinboard” for list the last lines of the pinboard Many of the commands are only used for debugging and development purposes

17. GSSD Meeting 12 April 200717 dCache SRM-watch https://srm.fnal.gov/twiki/bin/view/SrmProject/ SrmMonitoring Java servlet based application It’s in a prototype stage It extracts statistical data from SRM database and plot it It provides web accessible, dynamic views of SRM request states and associated transfers It provides web accessible, static views of system parameters per day/month/year