Difference between revisions of "DPM End of legacy-mode support"
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=== End users === | === End users === | ||
Traditionally, users interacted with DPM using a separate client, for example, SRM. With DOME, users interact with DPM via a frontend, e.g. gridFTP or xrootd, that | Traditionally, users interacted with DPM using a separate client, for example, SRM. With DOME, end users interact with DPM via a protocol frontend, e.g. HTTP/WebDAV, gridFTP or xrootd, that makes use of DOME in the background. For a comprehensive guide to DOME and its command set, please refer to the: [https://gitlab.cern.ch/lcgdm/dmlite/blob/master/doc/dome/dome.pdf DOME guide] | ||
in the background. For a comprehensive guide to DOME and its command set, please refer to the: [https://gitlab.cern.ch/lcgdm/dmlite/blob/master/doc/dome/dome.pdf DOME guide] | |||
=== DPM administrators and site admins === | === DPM administrators and site admins === |
Revision as of 10:27, 21 May 2019
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What's happening?
DPM (Disk Pool Manager) is the most widely deployed solution for storage of large data repositories on Grid sites for a wide range of applications. In May 2018 during the DPM Workshop the announcement was made that from June 2019 it would be deprecating its so-called "legacy" mode. This includes its support for SRM (Storage Resource Broker) and the old rfio protocol. It's also related to the deprecation of the lcg-utils clients, which already happened years ago.
Why?
The new DPM core, known as DOME (Disk Operations Management Engine) brings significant enhancements and is based on the secure, industry-standard HTTPS protocol and web services. Discontinuing the legacy mode allows the developers to concentrate on the new scalable and future-proof DOME, without the overhead of maintaining the legacy functionality.
What do I need to do?
End users
Traditionally, users interacted with DPM using a separate client, for example, SRM. With DOME, end users interact with DPM via a protocol frontend, e.g. HTTP/WebDAV, gridFTP or xrootd, that makes use of DOME in the background. For a comprehensive guide to DOME and its command set, please refer to the: DOME guide
DPM administrators and site admins
To see whether end users are making use of legacy tools, Please check the contents of your srmv2.2
logfile. If this file is only showing routine reports (e.g. daemon stop/start, ping etc.) then that indicates that SRM is not being actively used by users.
Information about installing DPM and enabling DOME may be found here: [1]
To determine whether lcg-utils clients are being used, please look for occurrences of PASV
in the gridftp logfile. (Newer clients such as gfal2 use STOR
instead, meaning a delayed passive ftp.)