the project is successfully delivered, and customer is happy, said "fantastic job"
the process is painful, and it’s stressful during the last two weeks
yesterday afternoon i resolved the last issue and feels relieved
many obstacles stands in the process
for this small project (a couple of million level), at least 5 parties involved (not counting customer):
1) our dev team, design, prototype, develop, test
2) data center team, prod infrastructure, deployment
3) ops support team, dev/qa infrastructure, dns, firewall rules, smtp
4) security team, ato, scan
5) fed manager
6) procurement team
about 2 to 3 meetings every week.
recipients number in email threads can easily go up to 10 or more
communication and response is slow, sometimes requests are ignored.
5 month is wasted due to initial wrong procurement and later re-procurement
security team jumped in, jumped out and jumped in again, due to confusion of ato.
everything has to be prepared and requested early, as it normally takes 1 ~ 2 week get it done. for instance, it takes about 2 weeks to get a dns
initial documentation process is also time consuming, review, review and review, each review may take 1 to 4 weeks.
many things need authorization and justification
it’s feeling bad and frustrated when many little stuff are not in control and have to rely on non-responsive others, such as helping customer install software, requesting vm, requesting dns, requesting smtp whitelist,
lots of restrictions due to security concerns. everything has to be certified.
and last ridiculous scheme: contract ends 9/29 and thus we cannot officially help customer unless being approved by fed boss. it’s like a big bang and then suddenly end. not healthy, not friendly.
have to move all ACCEPT rules before ALL REJECT rules
otherwise it does not work
struggled for quite some time
make sure to use the right workspace server
L = 2 * max_lags + 1
后来再想想，终于明白当初为什么设定L = 2 * max_lags + 1
这么做其实很不方便，L dependend on max_lags
而当时的情况是这样的：无法确定哪个channel在前面。而算法本身要求某个channel必须在另外一个channel后面。所以就想了这么个办法，先把一个channel往后挪max_lags，然后把L订成2 * max_lags + 1，这样总能cover。
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