Skip to main content
NetApp Knowledge Base

What are the ONTAP KTLS handshake limits

  1. Last updated
  2. Save as PDF
Views:
914
Visibility:
Public
Votes:
1
Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9.13.1 and higher
  • KTLS

Answer

  • For ONTAP 9.13.1 and higher, KTLS handshake limits are based on the number of CPU cores. 
  • ONTAP 9.17.1 added a second, or deferral and pending request queue effectively doubling the size of the handshake limits for applications. 
  • The deferral queue is enabled by default only for server connections. It is not enabled for client connections.
Number of CPU Cores 9.13.1 9.16.1 9.17.1

9.19.1
Concurrent Handshake Limit Concurrent Handshake Limit Concurrent Handshake Limit Deferral Queue Total Effective Limit Concurrent Handshake Limit Deferral Queue Total Effective Limit
1-2  50

50

 50 50 100 125 250 375
3-6  90 90 90 90 180 225 450 675
7-14  130 130 130 130 260 325 650 975
15-30 170 170 170 170 340 425 850 1275
31-62 210 210 210 210 420 525 1050 1575
63-126 250 250 250 250 500 625 1250 1875
127-254 Not supported 290 290 290 580 725 1450 2175

Additional Information

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.