Command options to limit excessive Windows client resource consumption in ONTAP
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Options to the vserver cifs options modify
command enable you to control resource consumption for Windows clients. This can be helpful if any clients are outside normal bounds of resource consumption, for example, if there are unusually high numbers of files open, sessions open, or change notify requests.
The following options to the vserver cifs options modify
command have been added to control Windows client resource consumption. If the maximum value for any of these options is exceeded, the request is denied and an EMS message is sent. An EMS warning message is also sent when 80 percent of the configured limit for these options is reached.
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-max-opens-same-file-per-tree
Maximum number of opens on the same file per CIFS tree
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-max-same-user-sessions-per-connection
Maximum number of sessions opened by the same user per connection
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-max-same-tree-connect-per-session
Maximum number of tree connects on the same share per session
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-max-watches-set-per-tree
Maximum number of watches (also known as change notifies) established per tree
Learn more about vserver cifs options modify
in the ONTAP command reference.
Beginning with ONTAP 9.4, servers running SMB version 2 or later can limit the number of outstanding requests (SMB credits) that the client can send to the server on a SMB connection. The management of SMB credits is initiated by the client and controlled by the server.
The maximum number of outstanding requests that can be granted on an SMB connection is controlled by the -max-credits
option. The default value for this option is 128.