Count of server measurements (about 2.2 per server per hour) and  
servers that were accurate within ~80ms, except one second ahead of  
the monitoring server.

Basically it was none until midnight (most hours on the day before are  
missing) and then 158; going down to 13 now.  Two of the RedHat's  
which are stratum 1 using a CDMA device IIRC.


  - ask

mysql> select date(ts) as day, hour(ts) as hour, count(*) as tests,  
count(distinct server_id) as servers  from log_scores where ts >  
'2008-12-31' and offset > 0.92 and offset < 1.08 group by  
date(ts),hour(ts);
+------------+------+-------+---------+
| day        | hour | tests | servers |
+------------+------+-------+---------+
| 2008-12-31 |    6 |     1 |       1 |
| 2008-12-31 |    7 |     1 |       1 |
| 2008-12-31 |   14 |     1 |       1 |
| 2008-12-31 |   15 |     2 |       1 |
| 2008-12-31 |   16 |     4 |       2 |
| 2008-12-31 |   17 |     2 |       1 |
| 2008-12-31 |   18 |     2 |       1 |
| 2008-12-31 |   19 |     3 |       1 |
| 2008-12-31 |   20 |     1 |       1 |
| 2009-01-01 |    0 |   238 |     158 |
| 2009-01-01 |    1 |    93 |      53 |
| 2009-01-01 |    2 |    69 |      41 |
| 2009-01-01 |    3 |    44 |      23 |
| 2009-01-01 |    4 |    43 |      20 |
| 2009-01-01 |    5 |    41 |      22 |
| 2009-01-01 |    6 |    46 |      21 |
| 2009-01-01 |    7 |    44 |      21 |
| 2009-01-01 |    8 |    43 |      20 |
| 2009-01-01 |    9 |    40 |      20 |
| 2009-01-01 |   10 |    35 |      18 |
| 2009-01-01 |   11 |    32 |      16 |
| 2009-01-01 |   12 |    34 |      15 |
| 2009-01-01 |   13 |    32 |      14 |
| 2009-01-01 |   14 |    28 |      13 |
| 2009-01-01 |   15 |    27 |      13 |
+------------+------+-------+---------+
25 rows in set (0.73 sec)





-- 
http://develooper.com/ - http://askask.com/


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