Possible MPU Server Purchases, 2021-24

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Our assumptions:

Use VMs
  • We can use virtual machines for non-critical "slave" roles.
  • Where we can replace server hardware with VMs we should do so, to release the server hardware for use elsewhere.

Hardware age
  • The LCFG master should be relatively young as it is so critically important.
  • The VM servers should be relatively young - we aim to replace them at 5 years old.
  • SSH servers should be young, so that their CPUs are still supported. They should be physical machines.
  • Any hardware with a non-critical function can be left until it fails, then replaced.
  • Machines without a user login of some form can be kept going even when Intel has dropped support for their CPUs. With user logins, not so much.

Warranties
  • Servers are purchased with a 5 year warranty.
  • Dell hardware is pretty reliable up to 7 years old, so it's safe to extend warranties to that age.

Ideas
  • We should look at using AMD processors in our KVM servers. More bang for the buck? Possible migration problems?
  • We should propose that MPU will place new guests on a KVM server, as Infrastructure does for physical servers.
  • KVM servers could be bought with their disk space in separate enclosures - if this looks cost-effective - to ease our transition to using Ceph storage pools for KVM.

MPU physical servers in June 2021

Service Function Age Warranty expires Machine Name Model
(spare) 7 2019-05 bruegel Dell R210 II
(spare) 7 2019-05 steen Dell R210 II
SL7 login and compute 7 2019-07 ashbury Dell R720
KVM for user guests 7 2021-06 amarela Dell R720
(spare) 7 2021-06 vermelha Dell R720
Offsite disaster recovery 6 2022-04 salamanca Dell R320
KVM test 6 2021-06 azul Dell R730
KVM IF 2 5 2021-06 girassol Dell R730
KVM IF 1 5 2021-06 gaivota Dell R730
Packages master and mirrors 4 2022-03 deneb Dell R330
LCFG slave IF 4 2022-03 altair Dell R230
LCFG slave AT 4 2022-03 vega Dell R230
Package cache IF 3 2023-04 regulus Dell R230
Package cache AT 3 2023-04 maia Dell R230
KVM AT 1 3 2023-06 banjo Dell R740
KVM AT 2 3 2023-06 mandolin Dell R740
Remote desktop 1 2 2024-02 lute Dell R440
Remote desktop 2 2 2024-02 archlute Dell R440
KVM offsite 1 2 2024-06 clavichord Dell R740
KVM offsite 2 2 2024-06 harpsichord Dell R740
LCFG Master 2 2024-06 canopus Dell R240
KVM IF 3 1 2025-06 piano Dell R740
Compute (student) 0 2025-07 selby Dell R6525
Compute (staff) 0 2025-07 hendry Dell R6525
Remote desktop 3 0 2025-08 cittern Dell R440
Remote desktop 4 0 2025-08 dulcimer Dell R440
Remote desktop 5 0 2025-08 guitar Dell R440
Remote desktop 6 0 2025-08 theorbo Dell R440
Remote desktop 7 0 2025-08 zither Dell R440
SSH (student/general) 0 2026-02 auriga Dell R240
SSH (staff) 0 2026-02 pegasus Dell R240

This year's (2020 to 2021) final spending

  • New servers sitar and sarod replace girassol and gaivota. One should have more but slower cores, and the other fewer but faster cores. Both should have plenty of memory and disk space.
    • gaivota replaces amarela as the KVM for user guests.
      • Extend warranty on gaivota.
      • amarela is scrapped.
    • girassol replaces azul as the KVM test.
      • azul is scrapped.
  • Scrap vermelha.
  • Scrap ashbury.

2021 to 2022 spending

Last year's prediction was that we would:

  • Replace salamanca, girassol and gaivota.
  • Extend warranties on deneb, altair and vega.

Our plan now is:

  • New server ukulele (cost 3000) replaces salamanca.
    • salamanca is scrapped or kept for testing.
  • Extend warranties on gaivota (cost 1000), deneb (200), altair (200) and vega (200).

MPU physical servers in June 2022

Service Function Age Warranty expires Machine Name Model
(scrapped, or test server) 8 2019-05 bruegel Dell R210 II
(scrapped, or test server) 8 2019-05 steen Dell R210 II
(scrapped, or test server) 7 2022-04 salamanca Dell R320
KVM test 6 2021-06 girassol Dell R730
KVM for user guests 6 2023-06 gaivota Dell R730
Packages master and mirrors 5 2023-03 deneb Dell R330
LCFG slave IF 5 2023-03 altair Dell R230
LCFG slave AT 5 2023-03 vega Dell R230
Package cache IF 4 2023-04 regulus Dell R230
Package cache AT 4 2023-04 maia Dell R230
KVM AT 1 4 2023-06 banjo Dell R740
KVM AT 2 4 2023-06 mandolin Dell R740
Remote desktop 1 3 2024-02 lute Dell R440
Remote desktop 2 3 2024-02 archlute Dell R440
KVM offsite 1 3 2024-06 clavichord Dell R740
KVM offsite 2 3 2024-06 harpsichord Dell R740
LCFG Master 3 2024-06 canopus Dell R240
KVM IF 3 2 2025-06 piano Dell R740
Compute (student) 1 2025-07 selby Dell R6525
Compute (staff) 1 2025-07 hendry Dell R6525
Remote desktop 3 1 2025-08 cittern Dell R440
Remote desktop 4 1 2025-08 dulcimer Dell R440
Remote desktop 5 1 2025-08 guitar Dell R440
Remote desktop 6 1 2025-08 theorbo Dell R440
Remote desktop 7 1 2025-08 zither Dell R440
SSH (student/general) 1 2026-02 auriga Dell R240
SSH (staff) 1 2026-02 pegasus Dell R240
KVM IF 2 0 2026-04 sitar Dell R750?
KVM IF 1 0 2026-04 sarod Dell R750?
Offsite disaster recovery 0 2026-08 ukulele Dell R350?

2022 to 2023 spending

  • Extend warranty on altair (cost 200).
  • Extend warranty on vega (cost 200).
  • Extend warranty on deneb (cost 200).
  • Extend warranty on regulus (cost 200).
  • Extend warranty on maia (cost 200).
  • Extend warranty on mandolin (cost 1000).
  • New server harp (cost 15000) replaces banjo.
    • KVM AT 1 moves to harp.
      • KVM test moves to banjo from girassol.
        • girassol is free, perhaps scrapped.
  • New server autoharp (cost 15000) replaces mandolin.
    • KVM AT 2 moves to autoharp.
      • KVM for user guests moves to mandolin from gaivota.
        • gaivota is free, perhaps scrapped.

MPU physical servers in June 2023

Service Function Age Warranty expires Machine Name Model
(scrapped, or test server) 9 2019-05 bruegel Dell R210 II
(scrapped, or test server) 9 2019-05 steen Dell R210 II
(scrapped, or test server) 8 2022-04 salamanca Dell R320
(scrapped, or test) 7 2021-06 girassol Dell R730
(scrapped, or test) 7 2021-06 gaivota Dell R730
Packages master and mirrors 6 2024-03 deneb Dell R330
LCFG slave IF 6 2024-03 altair Dell R230
LCFG slave AT 6 2024-03 vega Dell R230
Package cache IF 5 2024-04 regulus Dell R230
Package cache AT 5 2024-04 maia Dell R230
KVM test 5 2023-06 banjo Dell R740
KVM for user guests 5 2023-06 mandolin Dell R740
Remote desktop 1 4 2024-02 lute Dell R440
Remote desktop 2 4 2024-02 archlute Dell R440
KVM offsite 1 4 2024-06 clavichord Dell R740
KVM offsite 2 4 2024-06 harpsichord Dell R740
LCFG Master 4 2024-06 canopus Dell R240
KVM IF 3 3 2025-06 piano Dell R740
Compute (student) 2 2025-07 selby Dell R6525
Compute (staff) 2 2025-07 hendry Dell R6525
Remote desktop 3 2 2025-08 cittern Dell R440
Remote desktop 4 2 2025-08 dulcimer Dell R440
Remote desktop 5 2 2025-08 guitar Dell R440
Remote desktop 6 2 2025-08 theorbo Dell R440
Remote desktop 7 2 2025-08 zither Dell R440
SSH (student/general) 2 2026-02 auriga Dell R240
SSH (staff) 2 2026-02 pegasus Dell R240
KVM IF 2 1 2026-04 sitar Dell R750?
KVM IF 1 1 2026-04 sarod Dell R750?
Offsite disaster recovery 1 2026-08 ukulele Dell R350?
KVM AT 1 0 2027-08 harp Dell R750?
KVM AT 2 0 2027-08 autoharp Dell R750?

Problems to address in 2023-24

  • deneb will be too old to be Packages master and mirrors.
  • altair and vega warranties will run out, and they will also reach 7 years old this year.
  • regulus and maia warranties will run out during the year.
  • lute, archlute, canopus, clavichord and harpsichord warranties expire during this year. And we may want LCFG master to be younger than this.

2023 to 2024 spending

  • New server to replace deneb (cost 3000) as Packages master and mirrors.
  • New server to replace altair (cost 2000) as LCFG slave IF.
  • New server to replace vega (cost 2000) as LCFG slave AT.
  • New server to replace clavichord (cost 15000) as KVM offsite 1.
    • KVM for user guests could move to clavichord from mandolin.
      • Extend warranty on clavichord. (cost 1000)
      • Scrap mandolin.
  • New server to replace harpsichord (cost 15000) as KVM offsite 2.
    • KVM test could move to harpsichord from banjo.
      • Scrap banjo.
  • Extend warranties on lute and archlute (cost 500)
  • Extend warranties on regulus and maia. (cost 400)
  • Extend warranty on canopus (cost 200).
Topic revision: r10 - 26 Apr 2021 - 21:20:15 - AlastairScobie
 
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