if you are not familiar with hash table structure, take a bit
of time to read about it, a good article on wikipedia:
The dump prints only details of the slots (buckets) that have
data on it (size>0). The entry field in the dump content is
practically the index of the slot.
Hi,
While
working on the project to migrate my kamailio.cfg script
from kamailio 3.3.1 to 5.0.x, I discovered that in there
are 2 items in the same htable.
Below
the figure that illustrate this case :
1) Content of the MBXRANGE table :
mysql> select * from mbxrange;
+-----+-------------+-------------------------------------------------+------------+----------+
| id | key_name |
key_value |
value_type | key_type |
+-----+-------------+-------------------------------------------------+------------+----------+
| 0 | VERSION | 120104-173400
| 0 | 0 |
| 101 | 1 |
min=0100000000;max=0199999999;node=OPMVTS1VSE02 |
0 | 0 |
| 102 | 2 |
min=0200000000;max=0299999999;node=OPMVTS1VSE02 |
0 | 0 |
| 103 | 3 |
min=0300000000;max=0399999999;node=OPMVTS1VSE02 |
0 | 0 |
| 104 | 4 |
min=0400000000;max=0499999999;node=OPMVTS1VSE02 |
0 | 0 |
| 105 | 5 |
min=0500000000;max=0599999999;node=OPMVTS1VSE02 |
0 | 0 |
| 106 | 6 |
min=0600000000;max=0699999999;node=OPMVTS1VSE02 |
0 | 0 |
| 107 | 7 |
min=0700000000;max=0799999999;node=OPMVTS1VSE02 |
0 | 0 |
| 108 | 8 |
min=0800000000;max=0899999999;node=OPMVTS1VSE02 |
0 | 0 |
| 109 | 9 |
min=0900000000;max=0999999999;node=OPMVTS1VSE02 |
0 | 0 |
| 199 | maxmbxrange |
9 |
0 | 0 |
+-----+-------------+-------------------------------------------------+------------+----------+
11 rows in set (0.00 sec)
2) modparam instruction used in my
kamailio.cfg script:
modparam("htable", "htable",
"mbxrangeHash=>size=4;dbtable=mbxrange;")
3) Result of « kamctl fifo sht_dump mbxrangeHash » command
with kamailio version
3.3.x:
[root@op52is4router1 ~]# kamctl fifo sht_dump
mbxrangeHash
Entry:: 0
6::
min=0600000000;max=0699999999;node=OPMVTS1VSE02
Entry:: 1
7::
min=0700000000;max=0799999999;node=OPMVTS1VSE02
Entry:: 2
4::
min=0400000000;max=0499999999;node=OPMVTS1VSE02
Entry:: 3
5::
min=0500000000;max=0599999999;node=OPMVTS1VSE02
Entry:: 4
2::
min=0200000000;max=0299999999;node=OPMVTS1VSE02
Entry:: 5
3::
min=0300000000;max=0399999999;node=OPMVTS1VSE02
VERSION:: 120104-173400
Entry:: 6
maxmbxrange:: 9
Entry:: 7
1::
min=0100000000;max=0199999999;node=OPMVTS1VSE02
Entry:: 14
9::
min=0900000000;max=0999999999;node=OPMVTS1VSE02
Entry::
15
8:: min=0800000000;max=0899999999;node=OPMVTS1VSE02
Result of « kamcmd htable.dump
mbxrangeHash » command with kamailio version 5.0.x :
[root@vm-vse02-siprouter1
~]# kamcmd htable.dump mbxrangeHash
{
entry: 0
size: 1
slot: {
item: {
name: 6
value:
min=0600000000;max=0699999999;node=OPMMMS1VSE02
type: str
}
}
}
{
entry: 1
size: 1
slot: {
item: {
name: 7
value:
min=0700000000;max=0799999999;node=OPMMMS1VSE02
type: str
}
}
}
{
entry: 2
size: 1
slot: {
item: {
name: 4
value:
min=0400000000;max=0499999999;node=OPMMMS1VSE02
type: str
}
}
}
{
entry: 3
size: 1
slot: {
item: {
name: 5
value:
min=0500000000;max=0599999999;node=OPMMMS1VSE02
type: str
}
}
}
{
entry: 4
size: 1
slot: {
item: {
name: 2
value:
min=0200000000;max=0299999999;node=OPMMMS1VSE02
type: str
}
}
}
{
entry: 5
size: 2
slot: {
item: {
name: 3
value:
min=0300000000;max=0399999999;node=OPMMMS1VSE02
type: str
}
item: {
name: VERSION
value: 120104-173400
type: str
}
}
}
{
entry: 6
size: 1
slot: {
item: {
name: maxmbxrange
value: 9
type: str
}
}
}
{
entry: 7
size: 1
slot: {
item: {
name: 1
value:
min=0100000000;max=0199999999;node=OPMMMS1VSE02
type: str
}
}
}
{
entry: 14
size: 1
slot: {
item: {
name: 9
value:
min=0900000000;max=0999999999;node=OPMMMS1VSE02
type: str
}
}
}
{
entry: 15
size: 1
slot: {
item: {
name: 8
value:
min=0800000000;max=0899999999;node=OPMMMS1VSE02
type:
str
}
}
}
So, I can
see :
- The entry number is not incremental 1 by 1 ;
there are entry #1 to #7, then #14 and #15 (all have
size=1)
- For
the entry #5, its size is of 2 and it contains 2 items
I
don’t say here that this is a problem, but the way the
htable is loaded seems strange to me.
So
if there people who can explain me if what I see is normal
or not, and how the htable load process works, I would
appreciate.
Thanks
in advance.
Cordialement
Patrick GINHOUX
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