CN101201783A - Storage space shortage early warning method of network storage system - Google Patents

Abstract

The invention provides a storage space insufficiency early warning method of a network storage system, which comprises the following steps: when allocating the storage space of a user, presetting a time alarm threshold value according to the running state of the current system; estimating the time for completely occupying the current residual space by the written data according to the data writing speed of the storage space, the current free memory of the system, the total amount of the dirty data temporarily cached in the cache memory of the system and the current residual space of the storage space; comparing the estimated time value with the time alarm threshold value; and sending an alarm message when the estimated time value is smaller than the time alarm threshold value. By setting the alarm threshold value of the time concept, the invention can realize the timely early warning of insufficient storage space and enhance the effective management of the storage space.

Description

Early warning method for insufficient storage space in network storage system

technical field

The invention relates to an early warning method for insufficient storage space of a network storage system.

Background technique

Currently popular network storage systems include storage area network (SAN, Storage Area Network) and network attached storage (Network Attached Storage), among which storage area network is used to provide storage and backup management of enterprise business data or operator data Network-attached storage is to connect storage devices to a group of computers through a standard network topology, with a focus on helping workgroups and departmental organizations address the needs of rapidly increasing storage capacity.

The management methods of user permissions and storage space quotas for the two network storage systems are as follows: In order to facilitate the control and management of different users, the system provides user space quota management based on file system quota policies to limit the amount of space that a specific user can use. network storage space. For the storage area network, due to the particularity of the block device, the space quota management of the storage area network often adopts a mode in which the administrator assigns specific devices to different users for their separate use.

From the above description, it can be found that the storage area network and the network attached storage manage the user rights and space in roughly the same way, that is, it is set by the administrator at the time of creation, and if there is any change during use, it must be changed by a special person. . Although adopting this model can ensure a high degree of concentration of authority and is conducive to the maintenance of system security, the above-mentioned network storage system will have defects such as a long response period and a negative early warning mechanism when faced with emergencies. In particular, the storage space alarm threshold of the known technology is generally defined as a space concept, that is, when the current available space accounts for a small proportion of the total space, or when the system still has a large amount of available space left, the system will give an alarm prompt. For example, when the data to be written by the user is larger than the actual available space, and the remaining available space during the writing process reaches the preset alarm threshold, the system will alarm according to the preset. However, the writing operation will not stop at this time, so the actual entire space may have been exhausted before the administrator responds, and the writing operation will be forcibly terminated by the system. In this case, it is easy to cause loss of user data and Bring some other unnecessary troubles.

Contents of the invention

In order to solve the problems and defects in the above-mentioned known technologies, the object of the present invention is to provide an early warning system and method for insufficient storage space of a network storage system, so as to realize timely and effective early warning of insufficient storage space.

Therefore, a method for early warning of insufficient storage space in a network storage system provided by the present invention includes the following steps: when assigning a user's storage space, preset a time alarm threshold according to the current operating state of the system; Data writing speed, the current free memory of the system, the total amount of dirty data temporarily cached in the system's cache (cache), and the current remaining space of the storage space. It is estimated that the written data completely occupies the current remaining space time; comparing the estimated time value with the time alarm threshold; and sending an alarm message when the estimated time value is less than the time alarm threshold.

In addition, the present invention may also include the step of automatically expanding the storage space, so that when the available space of the system reaches a set threshold, the storage space is expanded according to the step size. The storage space shortage warning method of the network storage system described above also includes the step of presetting the automatic expansion of the storage space.

In the method for early warning of insufficient storage space in a network storage system as described above, when the current remaining space reaches a preset expansion threshold, the current remaining space is expanded according to the step size.

In the method for early warning of insufficient storage space in the network storage system as described above, the capacity to be increased each time when expanding the current remaining space is in the unit of hundreds of megabytes (M).

The present invention dynamically sets the alarm threshold through the real-time monitoring of the system operation, and then can make an alarm prompt in a timely and effective manner, so that the administrator can deal with the problem of insufficient space under the premise of sufficient time, and avoid writing data loss, to ensure the stable operation of the system. Or, by adding an automatic expansion mechanism, the system can automatically expand the user's storage space when no timely alarm feedback is received, so as to ensure the user's uninterrupted access to this storage space and enhance the effective management of the storage space.

Description of drawings

FIG. 1 is a flow chart of the steps of the early warning method for insufficient storage space in the network storage system of the present invention.

Wherein, the reference signs are explained as follows:

Step 102 preset time alarm threshold

Step 104 Run and monitor the system normally

Step 106 Reaching the alarm threshold?

Step 108 sends alarm information according to preset

Step 110 Preset capacity expansion?

Step 112 Reach the expansion threshold?

Step 114 performs spatial expansion according to the step size

Step 116 records the event in the log

Step 118 continues to run and monitor system status

Detailed ways

The features and practical operation of the present invention will be described in detail as follows with reference to the most preferred embodiment of the accompanying drawings.

Please refer to FIG. 1 , which is a flow chart of the method for early warning of insufficient storage space in the network storage system of the present invention.

As shown in Figure 1, when allocating storage space for users, the alarm threshold is preset in step 102, where the alarm threshold is defined as a time concept threshold, that is, according to the current operating state of the system, how long the system will be available The notion of time when the space will be exhausted is used to set the alarm threshold. Here the alarm threshold can be preset by the system administrator according to his experience or recommended value.

After the time alarm threshold is set, in step 104 the system runs normally and monitors in real time, so as to obtain the depletion time required for the current available space according to the current operating state of the system. Because the existing software and hardware structure introduces a large number of cache (cache) mechanisms, usually the instantaneous performance of an input/output operation cannot reflect the general situation of the system running speed, and then when estimating the exhaustion time of the current available space, it is necessary to Refer to the following information: the amount of write request data received by the system in the recent period, that is, each time data is written to the storage space, the speed of data writing is obtained from the amount of data written within this time, here is the time period The selection will be adjusted according to the system hardware speed and software conditions. The general scope should be defined in minutes; the free memory of the current system; the total amount of all cached dirty data (dirty data) in the system cache ; and the user's current available storage space, etc.

Here, cached dirty data refers to data information that is temporarily stored in a cache memory in an operating (file) system and has not yet been refreshed (written) into a storage device. This part of the data is not called "dirty data" because of correctness or multiple changes, but because it is delayed by the system cache memory policy, thus causing a temporary inconsistency between the information on the disk and the information in memory. Therefore, based on the above information, the time required to write all the data into the current available space of the storage space is comprehensively estimated, that is, the time required for the current available space to be exhausted.

When performing the action of writing data to the storage space, judging the current remaining space will have a certain impact on system performance, so combined with judging operations at the file system layer (such as network attached storage) or block device layer (such as storage area network ). Since the judgment operations are performed between the central processing unit and the memory, and the subsequent write action is located at the slower physical device layer, the nanosecond-level judgment operations will be diluted by the millisecond-level input/output operations, and further to the The impact on system performance is minimal.

At the same time, the system compares the obtained estimated time with the time alarm threshold in step 106 to determine whether the estimated time is less than the alarm threshold. When the estimated time does not reach the alarm threshold, the system is still running normally; otherwise, in step 108, an alarm message is automatically sent to the administrator according to preset settings, such as sending an email or giving a prominent reminder on the management interface. Therefore, after receiving the alarm information, the administrator can take corresponding measures according to the current situation, such as reminding the user that the space is about to be exhausted, or manually expanding the space for the user.

Preferably, the automatic expansion mechanism of the storage space can be preset. If the administrator fails to respond in time, resulting in a further reduction in the remaining storage space, it is determined in step 110 whether the system is equipped with an automatic capacity expansion mechanism. If there is an automatic space expansion mechanism, then in step 112, it is judged whether the remaining available space reaches the expansion threshold of the space, and if it reaches the expansion threshold, the expansion is performed according to the step size, so as to ensure the uninterrupted access of the user to this storage space; otherwise, continue Run the system and continue to judge until the available space reaches the set expansion threshold. Here, the step size for performing space expansion can be set by the administrator, or it can be automatically determined by the system according to the current operating conditions, and the capacity increased each time the expansion is performed, usually in the unit of 100 megabytes (M), so as to ensure sufficient More space for users to use without causing too much space waste.

After the expansion, the event can be recorded in the log at step 116. After the above step of judging that there is no preset automatic capacity expansion mechanism, then directly proceed to step 116 to record the event in the log. Then, at step 118 the system continues to run and monitors its running status in real time.

Although the present invention is disclosed above with the foregoing preferred embodiments, they are not intended to limit the present invention. Those skilled in the art should realize that without departing from the scope and spirit of the present invention disclosed in the appended claims of the present invention, all changes and modifications made belong to the patent protection scope of the present invention. For the scope of protection defined by the present invention, please refer to the appended claims.

Claims (4)

1. the memory space inadequate method for early warning of a network store system, the method includes the steps of:

When the storage space of assign users, preestablish a time alarm threshold value according to the running status of current system;

According to the current residual space of in the cache memory of the current free storage of the writing speed of this storage space, this system and this system, postponing depositing in dirty data total amount and this storage space, estimate the time that data occupy this current remaining space fully that writes;

Contrast the size of this estimated time value and this time alarm threshold value; And

When this estimated time value sends a warning message during alarm threshold value less than this time.

2. the memory space inadequate method for early warning of network store system as claimed in claim 1 also comprises the step of the automatic dilatation that preestablishes this storage space.

3. the memory space inadequate method for early warning of network store system as claimed in claim 2 wherein when this current remaining space reaches a default dilatation threshold value, carries out the expansion of this current remaining space according to step-length.

4. the memory space inadequate method for early warning of network store system as claimed in claim 3, wherein each capacity that increases is a unit with 100,000,000 when this current remaining space of expansion.

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