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19.05.2016
at least two types of services: a demon that handles the object storage device (OSD) and the monitor servers (MONs). The OSD ensures that the individual disks can be used in the cluster, and the MONs
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21.04.2016
to Greg about his background and some of his projects in general and about his latest initiative, Singularity, in particular. (Also see the article on Singularity.)
Jeff Layton: Hi Greg, tell me bit
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23.03.2016
, thermal throttling, HyperTransport bus, and others. One of the best sources of information about EDAC is the EDAC wiki.
Important Considerations for System Administration
Monitoring ECC errors
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24.02.2016
and doesn’t require much attention, others really want to understand exactly what is happening under the hood to further optimize the runtime of their applications, improve their monitoring, or port
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14.01.2016
. Be sure to keep a sys on it.
Info
3D XPoint: https://en.wikipedia.org/wiki/3D_XPoint
Layton, J., and Barton, E. "Fast Forward Storage & IO," http://storageconference.us/2014/Presentations
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16.06.2015
), or very large clusters might need nodes dedicated to monitoring the cluster or to logging in users to the cluster and running applications.
For a simple two-node cluster that you might use as your
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17.12.2014
performance from many perspectives (i.e., CPU, network, disk). The tool is called nmon
.
Nmon Overview
Nmon is short for “Nigel’s Monitor” and is a command-line tool that presents performance information ... Monitoring with Nmon
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19.11.2014
local or remote, in your browser using websocketd. Although I won't go into it in depth, Web-vmstat does a pretty good job monitoring problem servers. For example, if a node has been exhibiting strange
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07.10.2014
Jeff Layton ... ). Problems that crop up usually mean no X Window system or any other sort of GUI access to the server. Often, this also means that monitoring tools such as Ganglia [1] aren't giving you much or any information
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27.08.2014
of I/O, but it is also useful to look further down the stack to see how the I/O requests appear at the various layers. One layer that is useful to monitor is the block layer, which is near the bottom
