gridpp-storage.blogspot.com

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Musings on data confidentiality. Recently I was asked whether STFC should store classified data. Such as Secret data (being a gov't facility, all our data is already Official). If you look at a "normal" data centre like those run by the big cloud providers, they are typically set up to ensure data confidentiality. They have special personnel who are authorised to enter the data centre, and they have all sorts of physical security measures. If they store Secret data they will need clearance. Last year wil...

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Musings on data confidentiality. Recently I was asked whether STFC should store classified data. Such as Secret data (being a gov't facility, all our data is already Official). If you look at a normal data centre like those run by the big cloud providers, they are typically set up to ensure data confidentiality. They have special personnel who are authorised to enter the data centre, and they have all sorts of physical security measures. If they store Secret data they will need clearance. Last year wil...

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GridPP storage news | gridpp-storage.blogspot.com Reviews

https://gridpp-storage.blogspot.com

Musings on data confidentiality. Recently I was asked whether STFC should store classified data. Such as Secret data (being a gov't facility, all our data is already Official). If you look at a "normal" data centre like those run by the big cloud providers, they are typically set up to ensure data confidentiality. They have special personnel who are authorised to enter the data centre, and they have all sorts of physical security measures. If they store Secret data they will need clearance. Last year wil...

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gridpp-storage.blogspot.com

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GridPP storage news: April 2014

http://www.gridpp-storage.blogspot.com/2014_04_01_archive.html

How much of a small file problem do we have. Here at the Tier1 at RAL-LCG2; we have been draining disk servers with a fury (achieving over 800MB/s on a 10G NIC machine.) Well we get that rate on some servers with large files; but machines with small files achieve a lower rate, but how many small files do we have and is there a VO dependency. So I decided to look at our three largest LCG VOs. In tabula form; here is the analysis so far:. Space used by files 1GB. Dell OpenManage for disk servers. And final...

2

GridPP storage news: The firewall did it

http://www.gridpp-storage.blogspot.com/2015/06/the-firewall-did-it.html

The firewall did it. Now that we have sort of mostly finished setting up the DiRAC. Data transfers to RAL. We look at the weeks it took and wonder (a) was it worth it and (b) why did it take weeks? Last year will then move the data with the highest possible efficiency. Initially we are going to let it run as fast as it can until. We hit a reasonable target/limit - 3-400 megabytes per second. Edit: updated the image as I had inadvertently put a link in to a 'live' image rather than the snapshot]. Then the...

3

GridPP storage news: Mind The Gap

http://www.gridpp-storage.blogspot.com/2015/05/mind-gap.html

One of the features of modern data science - whether from big instruments. Lots of data sources. Or somewhere else - is that generally researchers need to collaborate to be able to manage the data. No single institute is able to cope with everything. Thus, many researchers use e-Infrastructures (or cyberinfrastructures to our North American friends), to connect resources and institutes together, but also to enable further collaborations with other researchers. Not to be confused with DIRAC. Dcache-server...

4

GridPP storage news: August 2014

http://www.gridpp-storage.blogspot.com/2014_08_01_archive.html

So what did CMS say at GridPP33? Having looked ahead to the future, they came up with more speculative suggestions. Like FNAL. In the past, one suggestion was to look again at scheduling network for transfers, what we might nowadays call network-as-a-service (well, near enough): since we schedule transfers, it would indeed make sense to integrate networks more closely with the pre-allocation at the endpoints (where you'd bringOnline(). Is a related approach from Internet2. CMS to speak later. It should b...

5

GridPP storage news: February 2015

http://www.gridpp-storage.blogspot.com/2015_02_01_archive.html

ATLAS MC deletion campaign from tape complete for the RAL Tier1. So ATLAS have just finished a deletion campaign of monte carlo data from our tape system at the RAL Tier1. The good news is that previous seen issues of transfers failing due to a timeout (due to misplacing an "I'm done" UDP packet ) seems to have been solved. What is also of interest (which I am now looking into;) is that ATLAS asked us to delete 211 files which they thought we had but we did not. Ceph stress testing at the RAL Tier 1.

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GridPP storage news

Musings on data confidentiality. Recently I was asked whether STFC should store classified data. Such as Secret data (being a gov't facility, all our data is already Official). If you look at a "normal" data centre like those run by the big cloud providers, they are typically set up to ensure data confidentiality. They have special personnel who are authorised to enter the data centre, and they have all sorts of physical security measures. If they store Secret data they will need clearance. Last year wil...

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