Changes between Version 18 and Version 19 of Internal/VirtualPL/ParallelImaging


Ignore:
Timestamp:
Nov 9, 2006, 5:13:18 PM (18 years ago)
Author:
anonymous
Comment:

Legend:

Unmodified
Added
Removed
Modified
  • Internal/VirtualPL/ParallelImaging

    v18 v19  
    1 == Steps in Imaging a Node ==
     1= Investigating parallel imaging using gexec =
     2
     3== Current approach for imaging a node ==
    24
    35The task of parallelization of imaging basically involves running multiple instances of nodeHandler which would launch different images on different nodes. The basic sequence of imaging of nodes as of now is as follows:
     
    1113 7. From now on the nodes boot up from the image stored in the hard disk.
    1214
     15== Changes needed for parallel imaging processes ==
    1316The imaging of nodes in parallel involves launching multiple instances of nodehandler which in turn implies launching more than one frisbee servers with different multicast addresses throwing away different images. At present the frisbee server settings are such that one multicast address per domain is allowed. For e.g. if a user is using a sb only one multicast address for a particular sb is allowed. So in case a user runs a second imageNodes in parallel, the frisbee server fetches the same nulticast address that results in an error. Thus the basic steps involved in parallelization would be :
    1417
     18
     19=== Basic steps ===
    1520 1. Tweaking the way frisbee server is launched, so that even if two frisbee servers are launched in the same domain, they throw images on different multicast addresses.
    1621 2. Making appropriate changes in nodeHandler.rb since right now the script only allows one instance of nodeHandler to run at a time.
     
    131136Date 10/26/2006
    132137
    133 Ping Experiments on Grid:
     138== Ping Experiments on Grid = :
    134139
    135140Ping experiments have been performed to determine the performance of grid when large number of nodes are being imaged in parallel, with different images. The results have been tabulated below: