Posts

How-to: Dump all disks on a z/OS system

I've been learning about z/OS and MVS over the last couple of weeks using the Master the Mainframe course and also the highly affordable courses from Interskill. I wanted to build something proper so I built a thing that can backup a full z/OS system to CCKD files (same as what Hercules/Hyperion uses). With the fixes for 64-bit CCKD to Hyperion now merged, and the 64-bit cckddump tooling appears to be in progress, this might come in handy for some folks.

This is the CCKDALL JCL: //CCKDALL JOB 1,NOTIFY=&SYSUID //DUMPJCL SET DUMPJCL=&SYSUID..JCL(CCKDDUMP) //DASDS EXEC PGM=SDSF //ISFOUT DD SYSOUT=* //CMDOUT DD DSN=&&SDSF,DISP=(NEW,PASS,DELETE),SPACE=(CYL,1), // RECFM=FB,LRECL=100 //ISFIN DD * SET CONSOLE BATCH SET DELAY 2 /D U,DASD,,,9999 PRINT FILE CMDOUT ULOG PRINT PRINT CLOSE //* //FMT EXEC PGM=ICETOOL //TOOLMSG DD //DFSMSG DD SYSOUT=* //IN DD DSN=&&SDSF,DISP=(OLD,DELETE,DELETE) //OUT DD DSN=&am…

Open Datacenter Hardware - Leopard Server

Image
Introduction The Leopard is an OpenRack v1 compliant 12V server commissioned by Facebook to offer compute power. It consists of 2x Intel Xeon E5-2678 v3 and is available with either DDR3 or DDR4 memory. The model is manufactured by two vendors primarily: Quanta and Wiwynn.

Leopard features a 24x PCIe slot which can fit either a PCIe card with low profile, or a riser card with 1x 16x and 1x 8x slots. The server also supports a 3.5" SATA drive as well as either an mSATA or an M.2 drive mounted on the motherboard.

Connectivity wise Leopard has a mezzanine card slot allowing for example 10Gb/s or 25Gb/s Ethernet.

Figure 1 and figure 2 shows the server layout. The server is made to fit inside an OpenRack v1 enclosure, at which point it looks something like figure 3. Due to power constraints an OpenRack v1 can fit 30 of these servers before power starts to become an issue. The Leopard servers that the organization Serverfarm Upstate provides are all fitted with 256GiB DDR3 RAM and 2x …