Hi Bjørn, You don't need to split large filesystems to get multiple backup sessions. If you use a resourceutilization larger than 2, you may get multiple sessions. With a value of 2, you will get 2 threads, a producer (queries server and scans filesystem for changed files) and a consumer (does the actual backup of the data). As you increase the resourceutilization, you get more producers and consumers. It's not a 1:1 ratio though, there's a table in this page that shows the potential number of producers and consumers depending on the resourceutilization value: https://www.ibm.com/docs/en/spectrum-protect/8.1.12?topic=sessions-optimizing-multiple One thing to keep in mind is that it's not a guarantee that you will get that number of sessions. It is an opportunistic process. If you have a high resourceutilization and the client determines that there's benefits to more sessions, it will start more. For example, a small filesystem may not see many sessions while a large would. It's all relative to the amount of work that has to be done. So, multiple sessions won't start right away. As it's scanning the filesystem, it will add more sessions as time elapsed. It's explained in further details in the link I shared above and how much time needs to be elapse. None of this is new, it's been that way for years.
Thanks, Marc... Marc Lanteigne Spectrum Protect Specialist AVP / SRT IBM Systems, Spectrum Protect / Plus "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> wrote on 02/10/2022 10:21:31 AM: > From: "Bjørn Nachtwey" <bjoern.nacht...@gwdg.de> > To: ADSM-L@VM.MARIST.EDU > Date: 02/10/2022 10:22 AM > Subject: [EXTERNAL] [ADSM-L] Does newer clients do parallelization > by themselves? > Sent by: "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> > > Hi all, > > I tried to get the answer by asking the support, but unfortunately they > just gave me advise on how to use VIRTUALMOUNTPOINTs ... > > well, > setting as well the MAXNUMMP as the RESOURECEUTILIZATION > 1 I do > observe several client backup sessions in the ISP server each > transferring data -- even if only one DOMAIN was defined. > Hugh, I do know the client works parallel on several DOMAINS, so using > VIRTUALMOUNTPOINT definitions allows to increase the the effective > bandwidth. > > Due to my observation: > Do the newer clients like 8.1.12 use any kind of internal > parallelization, so it's not necessary to split large data folder to > several virtual ones? > If so, does it effect the file tree walk as well as the transfer of the > data? > > Thanks & best > Bjørn > > -- > -------------------------------------------------------------------------------------------------- > Bjørn Nachtwey > > Arbeitsgruppe "IT-Infrastruktur“ > E-Mail:bjoern.nacht...@gwdg.de > -------------------------------------------------------------------------------------------------- > Gesellschaft für wissenschaftliche Datenverarbeitung mbH Göttingen (GWDG) > Burckhardtweg 4, 37077 Göttingen, URL:https:// > urldefense.proofpoint.com/v2/url? > u=https-3A__gwdg.de&d=DwIFaQ&c=jf_iaSHvJObTbx- > siA1ZOg&r=hMBqtRSV0jXgOdXEmlNk_- > O9LHkPCGSh9PJBRSlL8Q4&m=vaIKa3FRrsuWVc3OPhbxfBsMnLflXcnk1a_nCvLfsb0&s=- > rBpA_7soXgDii94uki8AOwubNSlSLYf5YXCTaUmPEY&e= > > Support: Tel.: +49 551 39-30000, URL:https:// > urldefense.proofpoint.com/v2/url? > u=https-3A__gwdg.de_support&d=DwIFaQ&c=jf_iaSHvJObTbx- > siA1ZOg&r=hMBqtRSV0jXgOdXEmlNk_- > O9LHkPCGSh9PJBRSlL8Q4&m=vaIKa3FRrsuWVc3OPhbxfBsMnLflXcnk1a_nCvLfsb0&s=b8KGF9fEn1HqXXcuvm4MoX30tj2pZ3ByOoFXldlzIEc&e= > Sekretariat: Tel.: +49 551 39-30001, E-Mail:g...@gwdg.de > > Geschäftsführer: Prof. Dr. Ramin Yahyapour > Aufsichtsratsvorsitzender: Prof. Dr. Norbert Lossau > Sitz der Gesellschaft: Göttingen > Registergericht: Göttingen, Handelsregister-Nr. B 598 > > Zertifiziert nach ISO 9001 > --------------------------------------------------------------------------------------------------
