Difference: August2009SystemUpgrades (1 vs. 8)

Revision 82009-08-10 - WilliamSeligman

Line: 1 to 1
 

August 2009 System Upgrades

Line: 93 to 93
  Remember, the more you leave on /data, the longer your system's upgrade will take.
Added:
>
>
The specific issue: Fedora Linux can handle logical volumes (LVM) on top of software RAID. Scientific Linux cannot. This is causing problems with hogwarts and polaris; a two-hour upgrade turned into an eight-hour nightmare. It remains to be seen whether Scientific Linux has a problem with systems that use hardware RAID or LVM created under Fedora: riverside, morningside, karthur, kolya, shang, han.

Revision 72009-08-10 - WilliamSeligman

Line: 1 to 1
 

August 2009 System Upgrades

Line: 82 to 82
 
  • franklin.nevis.columbia.edu, the mail server
  • ada.nevis.columbia.edu, the web server
  • annex.nevis.columbia.edu, the Annex server
Added:
>
>

Upgrade problems

I've immediately encountered a severe problem with upgrading the Nevis servers: Scientific Linux cannot read the disk-partitioning scheme I've used.

This means that, in order to preserve the /data partition on your system, I have to copy it to another machine, then restore it again. This saturates the Nevis network, and can take a substantial portion of a day.

Please delete anything that you don't need, or can quickly restore, from the /data partition of your server. If you can, please tell me that I don't have to restore your /data partition, or tell me I can delete file left behind by summer student, etc.

Remember, the more you leave on /data, the longer your system's upgrade will take.

Revision 62009-08-07 - WilliamSeligman

Line: 1 to 1
 

August 2009 System Upgrades

Line: 33 to 33
 

Wednesday, August 12

Changed:
<
<
  • karthur.nevis.columbia.edu
>
>
  • hypatia.nevis.columbia.edu
 
Changed:
<
<
This may cause a Nevis-wide slowdown of all systems, since karthur is the library server. This will also affect the e-mail/logins for members of D0 and those members of ATLAS with home directories on karthur, including ban.
>
>
If all goes well, no one's e-mail be affected, nor will any other visible aspects of the Nevis cluster.
 

Thursday, August 13

Line: 54 to 54
 

Tuesday, August 18

Changed:
<
<
  • hypatia.nevis.columbia.edu
>
>
  • karthur.nevis.columbia.edu
 
Changed:
<
<
If all goes well, no one's e-mail be affected, nor will any other visible aspects of the Nevis cluster.
>
>
This may cause a Nevis-wide slowdown of all systems, since karthur is the library server. This will also affect the e-mail/logins for members of D0 and those members of ATLAS with home directories on karthur, including ban.
 

Wednesday, August 19

Revision 52009-08-05 - WilliamSeligman

Line: 1 to 1
Deleted:
<
<
META TOPICPARENT name="Trash.CosmicRay"
 

August 2009 System Upgrades

Line: 12 to 11
 
  • Unless otherwise noted, the upgrades will take 2-3 hours.
  • If you see "this will affect e-mail/logins...", then:
    • The accounts listed won't be able to login or use e-mail during the upgrade;
Changed:
<
<
    • For everyone else, I'll reboot the mail server sometime between 3:00-3:15PM; I hope this will reduce the chance of a mail-server slowdown. It's a good idea for you to quit your e-mail program during that time.
>
>
    • For everyone else, I'll reboot the mail and web servers sometime between 3:00-3:15PM; I hope this will reduce the chance of a mail-server slowdown. It's a good idea for you to quit your e-mail program during that time.
 

Schedule

Revision 42009-07-24 - WilliamSeligman

Line: 1 to 1
Changed:
<
<
META TOPICPARENT name="WebHome"
>
>
META TOPICPARENT name="Trash.CosmicRay"
 

August 2009 System Upgrades

Revision 32009-07-20 - WilliamSeligman

Line: 1 to 1
 
META TOPICPARENT name="WebHome"
Changed:
<
<

August 2009 System Upgrades

>
>

August 2009 System Upgrades

There's only a two-week "window" in which I can perform these upgrades with the least impact on the Nevis research groups.

 

General procedure

Line: 10 to 14
 
    • The accounts listed won't be able to login or use e-mail during the upgrade;
    • For everyone else, I'll reboot the mail server sometime between 3:00-3:15PM; I hope this will reduce the chance of a mail-server slowdown. It's a good idea for you to quit your e-mail program during that time.
Changed:
<
<

Proposed schedule

>
>

Schedule

This is the list of systems I plan to upgrade on a given day.

 

Monday, August 10

Changed:
<
<
  • hogwarts.nevis.columbia.edu
  • polaris.nevis.columbia.edu
>
>
  • hogwarts.nevis.columbia.edu
  • polaris.nevis.columbia.edu
  This will affect e-mail/logins for grace.ho, willis, an2262, zhang.

Tuesday, August 11

Changed:
<
<
  • riverside.nevis.columbia.edu
  • morningside.nevis.columbia.edu
>
>
  • riverside.nevis.columbia.edu
  • morningside.nevis.columbia.edu
  This will affect the e-mail/logins for most of the Neutrino group.

Wednesday, August 12

Changed:
<
<
  • karthur.nevis.columbia.edu
>
>
  • karthur.nevis.columbia.edu
 
Changed:
<
<
This may cause a Nevis-wide slowdown of all systems, since karthur is the library server. This will also affect the e-mail/logins for members of D0 and those members of ATLAS with home directories on karthur, including ban.
>
>
This may cause a Nevis-wide slowdown of all systems, since karthur is the library server. This will also affect the e-mail/logins for members of D0 and those members of ATLAS with home directories on karthur, including ban.
 

Thursday, August 13

Changed:
<
<
  • kolya.nevis.columbia.edu
>
>
  • kolya.nevis.columbia.edu
 
Changed:
<
<
This will also affect the e-mail/logins for any members of ATLAS with home directories on kolya.
>
>
This will also affect the e-mail/logins for any members of ATLAS with home directories on kolya.
 

Monday, August 17

Changed:
<
<
  • hermes.nevis.columbia.edu
  • sullivan.nevis.columbia.edu
  • shang.nevis.columbia.edu
  • han.nevis.columbia.edu
>
>
  • hermes.nevis.columbia.edu
  • sullivan.nevis.columbia.edu
  • shang.nevis.columbia.edu
  • han.nevis.columbia.edu
  During these upgrades, condor will not be available. No Nevis mailing lists will be available. This will also affect the e-mail/logins for members of the DOE group, as well as shaevitz, annmarie, jsantini, bishop, capone, and sciulli.

Tuesday, August 18

Changed:
<
<
  • hypatia.nevis.columbia.edu
>
>
  • hypatia.nevis.columbia.edu
  If all goes well, no one's e-mail be affected, nor will any other visible aspects of the Nevis cluster.

Wednesday, August 19

Changed:
<
<
  • franklin.nevis.columbia.edu
>
>
  • franklin.nevis.columbia.edu
  This is our mail server. The upgrade will take 4-5 hours. During the upgrade, Nevis e-mail will not be available.
Line: 63 to 69
 

Thursday, August 21

Changed:
<
<
  • ada.nevis.columbia.edu
>
>
  • ada.nevis.columbia.edu
  This is our web server. The upgrade will take 4-5 hours. During the upgrade, all Nevis web services (including the Wiki, meeting-room schedules, calendars, etc.) will not be available.
Added:
>
>

What is the nature of the upgrade?

Unless otherwise noted, the Nevis cluster systems are being "upgraded" from Fedora 9 to Scientific Linux 5.3. That word is in quotes because the Scientific Linux 5 packages are earlier versions than those in Fedora 9, and the distribution has fewer features.

There is no "upgrade path" from Fedora 9 to Scientific Linux 5.3; I have to completely re-install the operating system. For some systems with a complex configuration, it would take too long to re-create those configurations in SL5.3. Therefore, the following systems being upgraded from Fedora 9 to Fedora 11, which will preserve the configuration information:

  • hypatia.nevis.columbia.edu, the central admin server
  • franklin.nevis.columbia.edu, the mail server
  • ada.nevis.columbia.edu, the web server
  • annex.nevis.columbia.edu, the Annex server

Revision 22009-07-20 - WilliamSeligman

Line: 1 to 1
 
META TOPICPARENT name="WebHome"
Changed:
<
<

August 2009 System Upgrades

>
>

August 2009 System Upgrades

 
Changed:
<
<

Proposed schedule:

>
>

General procedure

 
Changed:
<
<

Monday, August 10

>
>
  • System upgrades will start at 3PM of the given day.
  • Unless otherwise noted, the upgrades will take 2-3 hours.
  • If you see "this will affect e-mail/logins...", then:
    • The accounts listed won't be able to login or use e-mail during the upgrade;
    • For everyone else, I'll reboot the mail server sometime between 3:00-3:15PM; I hope this will reduce the chance of a mail-server slowdown. It's a good idea for you to quit your e-mail program during that time.

Proposed schedule

Monday, August 10

 
  • hogwarts.nevis.columbia.edu
  • polaris.nevis.columbia.edu
Changed:
<
<
This will affect the e-mail for grace.ho and willis.
>
>
This will affect e-mail/logins for grace.ho, willis, an2262, zhang.

Tuesday, August 11

  • riverside.nevis.columbia.edu
  • morningside.nevis.columbia.edu

This will affect the e-mail/logins for most of the Neutrino group.

Wednesday, August 12

  • karthur.nevis.columbia.edu

This may cause a Nevis-wide slowdown of all systems, since karthur is the library server. This will also affect the e-mail/logins for members of D0 and those members of ATLAS with home directories on karthur, including ban.

Thursday, August 13

  • kolya.nevis.columbia.edu

This will also affect the e-mail/logins for any members of ATLAS with home directories on kolya.

Monday, August 17

  • hermes.nevis.columbia.edu
  • sullivan.nevis.columbia.edu
  • shang.nevis.columbia.edu
  • han.nevis.columbia.edu

During these upgrades, condor will not be available. No Nevis mailing lists will be available. This will also affect the e-mail/logins for members of the DOE group, as well as shaevitz, annmarie, jsantini, bishop, capone, and sciulli.

Tuesday, August 18

  • hypatia.nevis.columbia.edu

If all goes well, no one's e-mail be affected, nor will any other visible aspects of the Nevis cluster.

Wednesday, August 19

  • franklin.nevis.columbia.edu

This is our mail server. The upgrade will take 4-5 hours. During the upgrade, Nevis e-mail will not be available.

Incoming e-mail won't be lost. It will be stored on the backup mail server in the Nevis Annex until the mail server comes back on.

Thursday, August 21

  • ada.nevis.columbia.edu

This is our web server. The upgrade will take 4-5 hours. During the upgrade, all Nevis web services (including the Wiki, meeting-room schedules, calendars, etc.) will not be available.

Revision 12009-07-20 - WilliamSeligman

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="WebHome"

August 2009 System Upgrades

Proposed schedule:

Monday, August 10

  • hogwarts.nevis.columbia.edu
  • polaris.nevis.columbia.edu

This will affect the e-mail for grace.ho and willis.

 
This site is powered by the TWiki collaboration platform Powered by PerlCopyright © 2008-2020 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback