python bindings :: checksum is not written on the server

[adriansev]

HI! While using .addJob(..., checksumtype = 'md5') after a successful message of file uploading i get none when doing xrdfs query checksum and if i use -C md5 i get Run: [ERROR] CheckSum error. Any idea what can be the problem?
Thank you

[simonmichal]

@adriansev : the checksumtype option is used when verifying if the data were not corrupted during transfer. Basically, you need to set

• checksumtype : the type of the checksum, e.g. md5 (server needs to be configured to support it)
• checksummode : end2end if you want the client to verify if the data were not corrupted during transfer
• checksumpreset : pre-computed checksum to be used as source checksum (it's optional)

Those options are not used to store a file checksum on the server.
For the xrdfs query checksum to work checksuming has to be enabled on the server side.

I hope this answer your question.

[adriansev]

Thank you, this answers my questions! (it would be great if these explanations make it to xrootd binding doc).

[simonmichal]

Absolutely, we will updates our documentation.