ISCSI e Jumbo Frame

Abilitare o non abilitare i Jumbo Frame su una infrastruttura ISCSI?

Molte volte mi sono imbattuto in questo quesito, all'inzio ero molto scettico pensando a quanti attori  sono coinvolti ....e anche adesso lo sono, soprattutto quando devi mettere mano a una infrastruttura esistente e non hai switch dedicati al backend di comunicazione dei nostri hosts con lo storage.

Questo articolo di VMware riassume la mia opinione:

 https://blogs.vmware.com/virtualblocks/2019/01/30/whats-the-big-deal-with-jumbo-frames/

   

Iscsi 10Gb and performance

Fast Ethernet is 100Mb/s throughput

12 MB/s speed (theorhetical)

Gig Ethernet is 1000Mb/s throughput

125 MB/s speed (theorhetical)

10 Gig Ethernet is 10,000Mb/s throughput

1250 MB/s speed (theorhetical)

Pratically on  ISCSI 10 Gig the throughput is 300-500 MBps it is very good.

Find serial number P2000 G3 HP

Use telnet or serial cable to connect


xxx.xxx.xxx.xxx login: admin
Password:

HP StorageWorks MSA Storage P2000 G3 iSCSI
System Name: SANxxx01
System Location: xxxxxxxx
Version: TS240P004-02
# show enclosure-status
Chassis                          Vendor   Product ID       CPLD EMP A CH:ID  Rev      EMP B CH:ID  Rev      WWPN
  Status
-----------------------------------------------------------------------------------------------------------------------------
2S6249C294                       HP       SPS-CHASSIS      22         00:031 2018           01:031 2018     500c0ff015fa2e3c
  OK
-----------------------------------------------------------------------------------------------------------------------------
Type     #  Status    FRU P/N      FRU S/N              Add'l Data
-------------------------------------------------------------------------------
FAN      01 OK        592267-002   CN8245T302           --
FAN      02 OK        592267-002   CN8245T303           --
PSU      01 OK        592267-002   CN8245T302           --
PSU      02 OK        592267-002   CN8245T303           --
Temp     01 OK        BK829B       CN8243M044           temp=41 C