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cluster data collected from production clusters in Alibaba for cluster management research
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Microservice-trace-2022/2021 MSCallGraph timestamp #194

Open wangsy503 opened 1 year ago

wangsy503 commented 1 year ago

Thank you for making these traces open-source! I have some questions about MSCallGraph timestamp, I've searched the issues but have not found an answer. 1) It seems like the timestamp for MSCallGraph table is not recorded in a 60s interval. Instead, it is recorded every ms (because it is continuous). Is that true? 2) The timestamp records the time when a request is sent from the um (not the time it receives the reply).

+--------------------+---------+----------+--------------------+-------+--------------------+--------------------+----+
|             traceid|timestamp|     rpcid|                  um|rpctype|                  dm|           interface|  rt|
+--------------------+---------+----------+--------------------+-------+--------------------+--------------------+----+
|73e7e49e159192966...|  6060435|         0|                null|   http|7695b43b41732a0f1...|27e468a9e023e3d90...|-159|
|73e7e49e159192966...|  6060471|     0.1.1|                 (?)|   http|6f83eed1237572824...|f4e3cafeeedb15b33...|-121|
|73e7e49e159192966...|  6060472|   0.1.1.1|6f83eed1237572824...|     mc|9653f5baba69c9fb5...|                null|   0|
|73e7e49e159192966...|  6060482|  0.1.1.10|6f83eed1237572824...|     mc|c964e78e1ee643bab...|                null|   1|
|73e7e49e159192966...|  6060483|  0.1.1.11|6f83eed1237572824...|     mc|59eea9a5f7ed349c3...|                null|   1|
|73e7e49e159192966...|  6060485|  0.1.1.12|6f83eed1237572824...|     mc|22fa7dbf2ea117787...|                null|   0|
|73e7e49e159192966...|  6060485|  0.1.1.13|6f83eed1237572824...|     mc|22fa7dbf2ea117787...|                null|   1|
|73e7e49e159192966...|  6060486|  0.1.1.14|6f83eed1237572824...|     mc|46a6d5047ff9337b3...|                null|   0|
|73e7e49e159192966...|  6060486|  0.1.1.15|6f83eed1237572824...|     mc|46a6d5047ff9337b3...|                null|   1|
niewuya commented 9 months ago

Thank you for your interest. Your understanding is correct; the timestamp in MSCallGraph is used to record the time when um sends a request.