IP Library › Granted Patent US 12711014
Granted Patent B2
US 12711014 · App. 18/939,968 · Granted Aug 18, 2026

Network health services and lifecycle correctness

Inventors: Libo Chen (San Carlos, CA); Eddie Hao (Palo Alto, CA); Daniel Geoffrey Karp (San Carlos, CA); Themistoklis Melissaris (San Bruno, CA); Sai Bhargav Varanasi (San Mateo, CA); Yuanfeng Wen (Sunnyvale, CA)
Assignee: Snowflake Inc.
G06F11/1438G06F9/3869G06F9/547G06F11/0757G06F11/1435G06F11/1604
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Quick Facts
Patent No.
US 12711014
App. No.
18/939,968
Granted
Aug 18, 2026
Kind
B2
Abstract

Monitoring health metrics of computing devices in a data system can be implemented at different levels. At a first level, local background services can be run locally on the computing devices to monitor a set of health metrics on the respective computing devices. At a second level, a central health marker service can monitor a set of health metrics for the computing devices.

Claims (50)

1 . A system comprising:

at least one hardware processor; and

at least one memory storing instructions that cause the at least one hardware processor to perform operations comprising:

receiving one or more timestamps associated with outputs of a computing device in a network-based data system in a defined time interval;

comparing the one or more timestamps to a reference clock based on a first threshold to determine whether the computing device has a future clock drift;

based on at least one of the one or more timestamps exceeding the first threshold, triggering a recycling operation for the computing device;

based on the one or more timestamps not exceeding the first threshold, comparing the one or more timestamps to the reference clock based on a second threshold to determine whether the computing device has a past clock drift; and

based on at least one of the one or more timestamps exceeding the second threshold, triggering the recycling operation for the computing device.

2 . The system of claim 1 , wherein the second threshold is greater than the first threshold.

3 . The system of claim 1 , wherein the one or more timestamps are received from a metadata database in the network-based data system.

4 . The system of claim 1 , wherein the recycling operation comprises:

changing a state of the computing device to a kill state;

transmitting a kill command to the computing device; and

terminating pending operations at the computing device in response to receiving the kill command.

5 . The system of claim 4 , wherein the recycling operation further comprises:

changing the state of the computing device to a fail state;

triggering a recovery operation for the computing device, the recovery operation comprising cleaning metadata associated with the computing device stored in a metadata database.

6 . The system of claim 4 , wherein the kill command is transmitted from a central health service to the computing device using a remote call.

7 . A method comprising:

receiving one or more timestamps associated with outputs of a computing device in a network-based data system in a defined time interval;

comparing the one or more timestamps to a reference clock based on a first threshold to determine whether the computing device has a future clock drift;

based on at least one of the one or more timestamps exceeding the first threshold, triggering a recycling operation for the computing device;

based on the one or more timestamps not exceeding the first threshold, comparing the one or more timestamps to the reference clock based on a second threshold to determine whether the computing device has a past clock drift; and

based on at least one of the one or more timestamps exceeding the second threshold, triggering the recycling operation for the computing device.

8 . The method of claim 7 , wherein the second threshold is greater than the first threshold.

9 . The method of claim 7 , wherein the one or more timestamps are received from a metadata database in the network-based data system.

10 . The method of claim 7 , wherein the recycling operation comprises:

changing a state of the computing device to a kill state;

transmitting a kill command to the computing device; and

terminating pending operations at the computing device in response to receiving the kill command.

11 . The method of claim 10 , wherein the recycling operation further comprises:

changing the state of the computing device to a fail state;

triggering a recovery operation for the computing device, the recovery operation comprising cleaning metadata associated with the computing device stored in a metadata database.

12 . The method of claim 10 , wherein the kill command is transmitted from a central health service to the computing device using a remote call.

13 . Computer-storage media comprising instructions that, when executed by one or more processors of a machine, configure the machine to perform operations comprising:

receiving one or more timestamps associated with outputs of a computing device in a network-based data system in a defined time interval;

comparing the one or more timestamps to a reference clock based on a first threshold to determine whether the computing device has a future clock drift;

based on at least one of the one or more timestamps exceeding the first threshold, triggering a recycling operation for the computing device;

based on the one or more timestamps not exceeding the first threshold, comparing the one or more timestamps to the reference clock based on a second threshold to determine whether the computing device has a past clock drift; and

based on at least one of the one or more timestamps exceeding the second threshold, triggering the recycling operation for the computing device.

14 . The computer-storage media of claim 13 , wherein the second threshold is greater than the first threshold.

15 . The computer-storage media of claim 13 , wherein the one or more timestamps are received from a metadata database in the network-based data system.

16 . The computer-storage media of claim 13 , wherein the recycling operation comprises:

changing a state of the computing device to a kill state;

transmitting a kill command to the computing device; and

terminating pending operations at the computing device in response to receiving the kill command.

17 . The computer-storage media of claim 16 , wherein the recycling operation further comprises:

changing the state of the computing device to a fail state;

triggering a recovery operation for the computing device, the recovery operation comprising cleaning metadata associated with the computing device stored in a metadata database.

18 . The computer-storage media of claim 16 , wherein the kill command is transmitted from a central health service to the computing device using a remote call.