HTTP Storage Requirements

This page tracks the required and desired functionality requested from HTTP storage, as defined by the HTTP Deployment Task Force.

We can classify these requirements in different ways, to discuss at the next meeting, but one possibility is

  • A: required for the deployment of HTTP to be worth pursing at all
  • B: required for SRM-free operation of disk storage
  • C: required for single-protocol (ie HTTP-only) disk storage
  • D: desirable feature
  • E: irrelevant

Functionality Atlas LHCb dCache DPM EOSSorted descending StorRM xrootd Comments
Get checksum C C Y Y Y (PROPFIND, custom Rest API) Y Y internal
Monitoring of HTTP traffic C (network monitoring, popularity ?) D N(planned) Y Y (internal, not via xrootd) N Y This refers to i/o monitoring (like xrootd fstream or similar)
Create, Read, Update, Delete A A Y Y Y (GET HEAD PUT DELETE OPTIONS) Y Y (AP: what is HTTP update?)
ACL Management D D N N Y (custom rest API) N N  
Multi-range requests D   Y Y Y Y Y  
Set checksum / type C, e.g., md5   N N set XS: support for custom header to preset checksum on PUT for OC - set type:Y N (if this means setting the checksum after the transfer) Y internal  
X509/VOMS AA A A Y Y RFC Proxies at VO granularity per storage area Y  
WebDAV (which bits?) PROPFIND, MOVE Partially Partially Y Partially: MKCOL PROPFIND PROPPATCH COPY MOVE LOCK UNLOCK - some special header support PROPFIND, CP, MV Y (AP: complex to answer, impossible to put Y here)
3rd Party Copy ↔ gridFTP D D Y ?   N N  
3rd Party Copy Source C D Y Y N N Y  
3rd Party Copy Destination C D N N N N Y  
Endpoint publication to BDII C C Y Y N Y Y  
Calculate checksum / type C, e.g., md5   N Y (md5, adler32) implicit (md5,adler32,crc32c,crc32,sha1) Y (adler32) Y internal  
Directory Space Reporting C C N N (planned) custom Rest API using subtree accounting N (planned) Y via virtual partitions To what hierarchical depth is this required?
3rd Party Copy ↔ S3 D D N Y, prototype ? N N  


This topic: LCG > WebHome > WLCGCommonComputingReadinessChallenges > WLCGOperationsWeb > WLCGOpsCoordination > HTTPDeployment > HTTPStorageRequirements
Topic revision: r14 - 2015-06-03 - unknown
 
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