The following article describes how the KCC will detect a DC failure if replication fails n times and for a period of m hours.
Between sites, n is 1 and m is 2, within sites, n is 0 or 1 and m is 2 or 12 (direct neighbours and non-direct neighbours, respectively).
Furthermore, the KCC will failback to the original DC, once it can be contacted.
I'm considering a change to value of m (30 minutes seems to be more appropriate) and wondered if anyone had any experience of this change. I'm also interested to hear why the default value is so high (2 hours). This seems to me to be too long a time to wait before failing over to another DC.
Any comments or feedback?
Thanks,
neil
PLEASE READ: The information contained in this email is confidential and
intended for the named recipient(s) only. If you are not an intended
recipient of this email please notify the sender immediately and delete your
copy from your system. You must not copy, distribute or take any further
action in reliance on it. Email is not a secure method of communication and
Nomura International plc ('NIplc') will not, to the extent permitted by law,
accept responsibility or liability for (a) the accuracy or completeness of,
or (b) the presence of any virus, worm or similar malicious or disabling
code in, this message or any attachment(s) to it. If verification of this
email is sought then please request a hard copy. Unless otherwise stated
this email: (1) is not, and should not be treated or relied upon as,
investment research; (2) contains views or opinions that are solely those of
the author and do not necessarily represent those of NIplc; (3) is intended
for informational purposes only and is not a recommendation, solicitation or
offer to buy or sell securities or related financial instruments. NIplc
does not provide investment services to private customers. Authorised and
regulated by the Financial Services Authority. Registered in England
no. 1550505 VAT No. 447 2492 35. Registered Office: 1 St Martin's-le-Grand,
London, EC1A 4NP. A member of the Nomura group of companies.
