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JonathanBer-5963 avatar image
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JonathanBer-5963 asked SunnyNiu-MSFT commented

Peer cache and InPlace Upgrade, supposed to work ?

Is the action "Upgrade operating system" can use the peer cache ?

In my TS, action like "install software" will download the sotfware from the peer source (MTGG) but at the Upgrade step, the Upgrade package files are downloaded from distribution point and not from the peer source. The peer source have the package in ccm\cache


I modified my TS by adding the "download content" step before the step "upgrade operating system" to see if it will download from peer source, but no, same thing, download from distribution point

variable SMSTPeerDownload=true is set

in my smsts.log:
82952-2021-03-30-15-16-47.png


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SunnyNiu-MSFT avatar image
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SunnyNiu-MSFT answered SunnyNiu-MSFT commented

@JonathanBer-5963
Here is an answer to your question that hopefully you find helpful!
There are some limitations for a client to access to a peer cache source and please also help check them. A peer cache source rejects requests for content when it meets any of the following conditions at the time a peer requests content:

1)Low battery mode
2)Processor load exceeds 80%
3)Disk I/O has an AvgDiskQueueLength that exceeds 10
4)There are no more available connections to the computer
5)We need consider the size of larger content such as OS upgrade packages. We could compare our need for this content against the available disk space on peer cache sources.

Here are some articles for reference:
https://docs.microsoft.com/en-us/mem/configmgr/core/plan-design/hierarchy/client-peer-cache#guidance-for-cache-management


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i already know that, the peer cache source meets the conditions, because in the same TS, just before the Upgrade step, its download peer files for a software. Because is test, only one device make request to the peer source

in the smsts.log, I would especially like to know what mean "Peer token not available", that's why it doesn't download from peer.

Peer token not available, skipping peer location: https://MTGG.domain.com/SCCM_BranchCache$/P01001BD OSDDownloadContent 2021-03-30 14:37:49 4560 (0x11D0)

can we check a log file on the peer source to see why is reject ?

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We may try to check ContentTransferManager.log, DataTransferService.log and CAS.log on the client peer cache source for more potential error or indication of cause.


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PaD-7009 avatar image
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PaD-7009 answered JonathanBer-5963 commented
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yeah, but InP¨lace Upgrade is not PE phase

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