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XROOTD-L  February 2012

XROOTD-L February 2012

Subject:

Re: data only goes to first drive

From:

Keith Beattie <[log in to unmask]>

Reply-To:

Support use of xrootd by HEP experiments <[log in to unmask]>

Date:

Fri, 17 Feb 2012 16:53:28 -0800

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (163 lines)

Here it is:

-----
all.role server
all.manager santa 3121

all.adminpath /export/data/xrd/admin
all.pidpath   /export/data/xrd/admin

all.export / nostage
oss.localroot    /export/data/xrd/ns

oss.space public /export/data/xrd/data
oss.space public /export/data/xrd/data
oss.space public /export/data1/xrd/data
oss.space public /export/data1/xrd/data
oss.space public /export/data2/xrd/data
oss.space public /export/data2/xrd/data
oss.space public /export/data3/xrd/data
oss.space public /export/data3/xrd/data
------

On 02/17/12 16:46, Andrew Hanushevsky wrote:
> Hi Keith,
>
> Please send me your config file.
>
> Andy
>
> On Fri, 17 Feb 2012, Keith Beattie wrote:
>
>> ok, I spoke too soon, this problem seems to be back.
>>
>> I've added data server nodes, now 13 of them, each with 3 drives and
>> only the first drive is getting populated with any data - except for 1
>> of them. After loading the cluster with lots of files, the first drive
>> on all of them are at 100% usage with the rest of the drives at 3-5%
>> usage. The one outlier's 2nd drive is at 20% usage. All these drives
>> are 6-700 GB total size.
>>
>> Digging deeper on each data server node, on all of them (except for
>> that outlier) oss.localroot (/export/data/xrd/ns/) is not getting
>> populated with symlinks into the 'oss.space public' locations
>> (/export/data*/xrd/data/) but the data files are directly there.
>> Further, there *are* lots of files under the oss.space public
>> locations (e.g. /export/data2/xrd/data/public/1B/271B3B4FDB000000176%)
>> but they are all empty!
>>
>> On the one outlier there are symlinks to the 2nd drive, but that only
>> accounts for ~200 of the ~1000 entries under oss.localroot there.
>>
>> The config files for each of the data server nodes are identical.
>>
>> I tried duplicating the oss.space public lines in the configs, as was
>> previously suggested but that didn't seem to change anything.
>>
>> I'll try some other test, like using xrootd 3.0.5, different configs,
>> but these test take a while to complete, so I'm hoping this rings some
>> bells here as to what I might be missing.
>>
>> Thanks,
>> ksb
>>
>> On 01/30/12 12:47, Keith Beattie wrote:
>>> to follow up here...
>>>
>>> I've tried it again, with the same configs, and now it works. To the
>>> best of my knowledge nothing is different, except the absence of this
>>> problem - both drives on all the clients are receiving data.
>>>
>>> I'd rather know what fixed it, but I'll take it and move on.
>>>
>>> Thanks for your help,
>>> ksb
>>>
>>> On 12/20/11 5:08 PM, Keith Beattie wrote:
>>>> Here you go, attached. Both from xrootd and cmsd.
>>>>
>>>> Thanks,
>>>> ksb
>>>>
>>>> On 12/16/11 11:55 PM, Wilko Kroeger wrote:
>>>>>
>>>>> Hello Keith
>>>>>
>>>>> I am using the release 3.1.0 at slac with cache systems (using
>>>>> oss.space
>>>>> public ...) and files are placed in all cache systems.
>>>>> Could you maybe post the startup message from the xrdlog?
>>>>>
>>>>> Cheers,
>>>>> Wilko
>>>>>
>>>>>
>>>>>
>>>>> On Fri, 16 Dec 2011, Keith Beattie wrote:
>>>>>
>>>>>> Hi Andy,
>>>>>>
>>>>>> I'm using 3.1.0, built from source. I tried doubling the oss.cache
>>>>>> lines and the servers failed to start. When using oss.space rather
>>>>>> than oss.cache, doubling those lines isn't fatal, but regardless I
>>>>>> get
>>>>>> the same behavior - data only to the first entry.
>>>>>>
>>>>>> Thanks,
>>>>>> ksb
>>>>>>
>>>>>> On 12/16/11 6:06 PM, Andrew Hanushevsky wrote:
>>>>>>> Hi Keith,
>>>>>>>
>>>>>>> You may not be missing anything, depending on what version you are
>>>>>>> using. There was a bug that exhibited exactly this behaviour. The
>>>>>>> bypass
>>>>>>> (other than upgrading to atleast 3.0.2) is to list the oss.cache
>>>>>>> entries
>>>>>>> twice for each path.
>>>>>>>
>>>>>>> Andy
>>>>>>>
>>>>>>> On Fri, 16 Dec 2011, Keith Beattie wrote:
>>>>>>>
>>>>>>>> Hello all,
>>>>>>>>
>>>>>>>> This seems like I'm missing something simple but can't seem to find
>>>>>>>> it.
>>>>>>>>
>>>>>>>> On my data servers nodes, only the first 'oss.cache' entry is
>>>>>>>> getting
>>>>>>>> data, the following disks don't seem to ever get written to.
>>>>>>>> Below is
>>>>>>>> an example of what the config looks like on the data nodes (not
>>>>>>>> santa
>>>>>>>> where the manager is running). What am I missing?
>>>>>>>>
>>>>>>>> ----
>>>>>>>> all.role server
>>>>>>>> all.manager santa 3121
>>>>>>>>
>>>>>>>> all.export /
>>>>>>>> oss.localroot /data/ns
>>>>>>>> oss.cache public /data/xrddata
>>>>>>>> oss.cache public /data1/xrddata
>>>>>>>> ----
>>>>>>>>
>>>>>>>> i.e. /data/xrddata gets filled, /data1/xrddata does not.
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>> ksb
>>
>> ########################################################################
>> 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
>>

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