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Dittos -- Wei Yang | [log in to unmask] | 650-926-3338 ________________________________________ From: [log in to unmask] <[log in to unmask]> on behalf of Fabrizio Furano <[log in to unmask]> Sent: Friday, March 2, 2018 1:29:59 AM To: Hanushevsky, Andrew B. Cc: xrootd-l; Mihai Patrascoiu; Matevz Tadel Subject: Re: Testing the XrdPss with cachelib - Issues with writing Hi Andy, thanks for the hints. My opinion is that a passthrough option would be a very big plus for the caching proxy, and I was sincerely surprised by this limitation. For some of our use cases I believe that we will start using it without caching, as I can't imagine how to give a transparent service by having to force clients to use different paths for reading and writing. What do you think ? Thank you Fabrizio On 03/01/2018 06:09 PM, Andrew Hanushevsky wrote: > Correct, we don't support a writable cache because that's not what a cache is all about. Does the origin support writes? If so, > we could potentially provide a cache passthrough option. Otherwise, if the readable and writable path differ, he could have run > two proxies -- one caching for read access and a passthru proxy for writing then setup a redirect directive in the primary proxy > (i.e. the one that will be initially used) to direct writes to the passthru proxy based on path. > > Andy > > On Thu, 1 Mar 2018, Fabrizio Furano wrote: > >> Hi, >> >> Mihai is trying to setup a small Pss machine that also works as a cache. >> >> For reading it seems to work fine, yet it stubbornly refuses to write files with >> this error: >> >>> 180301 17:27:38 13788 XrdFileCache_Manager: debug Cache::Attach() >>> root:[log in to unmask]:1094//eos/xdc/testing/hello.txt?&oss.asize=14&oss.lcl=1 location: <deferred open> >>> 180301 17:27:38 13788 root.3008:20@xdc-test-fst1 ofs_fstat: fn=/eos/xdc/testing/hello.txt >>> 180301 17:27:38 13788 root.3008:20@xdc-test-fst1 XrootdResponse: 0100 sending 46 data bytes; status=0 >>> 180301 17:27:38 13788 root.3008:20@xdc-test-fst1 XrootdProtocol: 0100 req=write dlen=14 >>> 180301 17:27:38 13788 root.3008:20@xdc-test-fst1 XrootdProtocol: 0100 fh=0 write 14@0 >>> 180301 17:27:38 13788 root.3008:20@xdc-test-fst1 ofs_write: 14@0 fn=/eos/xdc/testing/hello.txt >>> 180301 17:27:38 13788 ofs_write: root.3008:20@xdc-test-fst1 Unable to write /eos/xdc/testing/hello.txt; operation not supported >>> 180301 17:27:38 13788 root.3008:20@xdc-test-fst1 XrootdProtocol: 0100 discarding 0 bytes >>> 180301 17:27:38 13788 root.3008:20@xdc-test-fst1 XrootdResponse: 0100 sending err 3005: Unable to write >>> /eos/xdc/testing/hello.txt; operation not supported >>> 180301 17:27:38 13788 root.3008:20@xdc-test-fst1 XrootdProtocol: 0100 req=close dlen=0 >>> 180301 17:27:38 13788 root.3008:20@xdc-test-fst1 ofs_close: use=1 fn=/eos/xdc/testing/hello.txt >> >> If we remove the directive pss.cachelib then writes work instead. >> >> Can anyone give us a clue please ? >> >> Thank you >> Fabrizio and Mihai >> >> > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1