IMAP4 (PI_IMP4)
- Organization of this page
Function
The IMAP4 (PI_IMP4) record stores information about IMAP4 service response time. This is a multi-instance record.
Default and changeable values
|
Item |
Default value |
Changeable |
|---|---|---|
|
Collection Interval |
360 |
Y |
|
Collection Offset |
0 |
Y |
|
Log |
No |
Y |
|
LOGIF |
(Blank) |
Y |
|
Over 10 Sec Collection Time |
No |
N |
ODBC key fields
PI_IMP4_MSR_COND_ID
Lifetime
None
Record size
-
Fixed part: 681 bytes
-
Variable part: 380 bytes
Fields
|
View name (Manager name) |
Description |
Summary rule |
Format |
Delta |
Data source |
|---|---|---|---|---|---|
|
Data Transfer Time (DATA_TRANS_TIME) |
Data transfer time (seconds) ((7) in Figure 10-6) |
AVG |
double |
No |
Probe Daemon |
|
Deletion Time (DELETION_TIME) |
Deletion time (seconds) ((8) in Figure 10-6) |
AVG |
double |
No |
Probe Daemon |
|
DNS Time (DNS_TIME) |
DNS time (seconds) ((4) in Figure 10-6) |
AVG |
double |
No |
Probe Daemon |
|
Download Count (DOWNLOAD_COUNT) |
Number of acquired emails |
AVG |
double |
No |
Probe Daemon |
|
IMAP Time (IMAP4_TIME) |
IMAP4 time (seconds) ((3) in Figure 10-6) |
AVG |
double |
No |
Probe Daemon |
|
Preprocessing Time (PRE_PROCESS_TIME) |
Preprocessing time (seconds) ((6) in Figure 10-6) |
AVG |
double |
No |
Probe Daemon |
|
Setup Time (SETUP_TIME) |
Setup time (seconds) ((2) in Figure 10-6) |
AVG |
double |
No |
Probe Daemon |
|
TCP Connection Time (TCP_CON_TIME) |
TCP connection time (seconds) ((5) in Figure 10-6) |
AVG |
double |
No |
Probe Daemon |
|
Throughput (THROUGHPUT) |
Throughput for email acquisition (bits/second). This is determined by the total size of emails and the data transfer time. |
AVG |
double |
No |
Probe Daemon |
|
Total Amount of Data (TOTAL_DATA_SIZE) |
Total amount of data transferred between the IMAP4 probe and the measurement-target server via the TCP connection (bytes) |
AVG |
double |
No |
Probe Daemon |
|
Total Response Time (TOTAL_RESP_TIME) |
Total response time (seconds) ((1) in Figure 10-6) |
AVG |
double |
No |
Probe Daemon |
|
Total Size of Email (TOTAL_EMAIL_SIZE) |
Total size of acquired email (bytes) |
AVG |
double |
No |
Probe Daemon |
The following figure shows the IMAP4 sequence.
|
|
![[Figure]](GRAPHICS/ZUV09050.GIF)
IMAP4 operating environment and notes
An IMAP4 probe measures the time required for completing reception of emails addressed to a specified user.
The following describes and provides notes on an IMAP4 operating environment.
Email size
The total size of an email for the IMAP4 probe is the received header plus the message text. There is no limitation to the size of an email that can be acquired.
Deleting emails
The IMAP4 probe acquires the newly arrived emails in an inbox. Executing deletion deletes all the emails in that inbox. This means that at the next measurement, the number of emails to be measured would be zero. Therefore, send emails for measurement again before the next measurement occurs.
Deletion method
The two email deletion methods for IMAP4 are logical deletion and physical deletion. An IMAP4 probe uses the physical email deletion method, so that emails are not accumulated when the IMAP4 probe receives emails that are sent periodically by a program such as a SMTP probe.
RFC compliance
-
RFC1733: Distributed Electronic Mail Models in IMAP4
-
RFC2060: Internet Message Access Protocol (IMAP) - Version 4 Rev 1
-
RFC2683: IMAP4 Implementation Recommendations
-
RFC2822: Internet Message Format
For the functions that are not compliance with RFCs and the restrictions, see the above notes.