读操作

这样可以防止更新基础表，但允许读操作（如select语句）。

This prevents updates to the underlying table but allows read operations , such as select statements .

使用键执行随机读操作的最常见RPG方法是CHAIN操作。

The most common RPG method for performing a random read using a key is the CHAIN operation .

算法所需的运算只有RAM的读操作与乘法、加法运算。

All the operations needed are addition , multiplication and RAM reading .

在某些情况下，如果读操作远远大于写操作，volatile变量还可以提供优于锁的性能优势。

In situations where reads greatly outnumber writes , volatile variables may also provide a performance advantage over locking .

就是说，在目前大多数的处理器架构上，volatile读操作开销非常低&几乎和非volatile读操作一样。

That said , on most current processor architectures , volatile reads are cheap & nearly as cheap as nonvolatile reads .

在成功更新后，控制器应该重定向到执行“读操作”的URL。

After a successful update operation , the controller should redirect to a URL that does a read operation .

由于SELECTINTO返回单个行，因此它不能用于其他RPG读操作。

Because the SELECT INTO returns a single row it cannot be used for other RPG read operations .

如果读操作的次数要远远超过写操作，与锁相比，volatile变量通常能够减少同步的性能开销。

In cases where reads greatly outnumber writes , volatile variables can often reduce the performance cost of synchronization compared to locking .

保密位可用来防止软件被盗用和并行编程模式下未被授权团体对FLASH的读操作。

The Security Bit protects against SOFTWARE piracy and prevents the contents of the FLASH from being read by unauthorized parties in Parallel Programmer Mode .

然而，如果不涉及XML解析，那么文件系统缓存能够帮助提高对CLOB列的读操作。

However , file system caching can help read operations on CLOB columns if no XML parsing is involved .

然而，如果读操作远远超过写操作，您可以结合使用内部锁和volatile变量来减少公共代码路径的开销。

However , if reads greatly outnumber modifications , you can combine intrinsic locking and volatile variables to reduce the cost on the common code path .

在研究PCIAD双向总线及PCI总线读操作时序特性的基础上，提出了基于分时复用技术实现PCIAD总线再复用的模型。

This paper proposes a model of reusing PCI AD bus based on the study of the PCI AD bi-direction bus and its read operation timing using the time-sharing reuse technology .

DPF对于以读操作为主的工作负载很有用，包括数据仓库环境中常见的工作负载。

DPF can be useful for read-intensive workloads , including those common to data warehouse environments .

试图对正在执行读操作的ZZ进行写。

An attempt was made to write to the reading ZZ .

通过定义主从机读操作的两次握手命令-应答帧格式及其参数改写子VI实现数据采集。

Data acquisition was realized by defined two times of handshake order or response frame format and VI of read-write operation between host and slave computers .

我在这里假设这个读操作（作为API层的入口点）不会反过来对数据库调用写操作。

I am making the assumption here that the read operation ( as an entry point to the API layer ) is not in turn invoking write operations on the database .

然而，您可以在读操作中使用volatile确保当前值的可见性，因此可以使用锁进行所有变化的操作，使用volatile进行只读操作。

However , you can use volatile to ensure the visibility of the current value when reading , so you use locking for all mutative operations and volatile for read-only operations .

LDAP是一种轻量级的目录访问协议，它对数据的读操作进行了优化，非常适合用于像网格服务这种频繁读取数据的资源管理系统。

LDAP is a kind of light directory access protocol , which optimizes the data-read operation . It is suitable for the resource management in grid service that requires frequent reading operations .

RPG程序更新通过键访问的行之前，必须执行一个读操作，以便锁定该行，进行更新。

Before an RPG program updates a row accessed by a key it must perform a read operation to lock the row for update intent .

对于顺序和随机写操作，以及顺序读操作来说，它的性能非常优秀，根据Google的性能基准测试，它能在某些测试项目中得分领先SQLite两个数量级。

The result is good performance for sequential and random writes , and sequential reads , beating SQLite by two orders of magnitude in some tests , according to a Google performance benchmark .

为了在FPGA上实现简化的PCI接口控制器采用模块设计的方法，将PCI接口逻辑分成四个模块，重点介绍了状态机模块的设计，并给出了存储器读操作的仿真波形。

In order to realize a simply PCI Target interface on FPGA , building block design method was introduced . The PCI interface logic was divided into four modules . And the designing of state-machine module was emphatic introduced .

HotStandby还附带一个好处，即负载平衡读操作。

HotStandby also has a beneficial side effect of load balancing read operations .

rw参数，使用它指明预抓取数据是为了执行读操作，还是执行写操作

The rw parameter , which you use to indicate whether the data is being pulled in for Read or preparing for a Write operation

OpenLDAP软件和包提供了创建目录信息树（一个主要进行读操作的数据库）的工具。

The OpenLDAP software and the packages it interfaces with provide tools to create a Directory Information Tree , a read-mostly database .

如果应用程序对某个文件进行写操作（而不是读操作），那么永久存储分页将是经过修改的，并且AIX必须在释放这些分页之前将其刷新到磁盘。

If the application had been doing writes to the file instead of reads , the permanent storage pages would be " modified ," and AIX would have to flush the pages to disk before releasing the pages .

按照我的理解，Azul硬件的关键优势之一是它直接支持写操作和读操作屏障以获得低GC停顿。

InfoQ : As I understand it a key advantage of Azul 's hardware is that it has direct support for write and read barriers which allows you to obtain low GC pauses .

当客户机完成读操作时，它以LAYOUTRETURN表示操作结束。

When the client is finished reading , it expresses the end of the operation with LAYOUTRETURN .

因此，应提供足够的缓冲池空间来支持索引读操作。

Thus , provide sufficient buffer pool space to support index reads .

读操作期间发生了磁盘错误。

A disk error has occurred during a read operation .

如果为真，只有读操作可以进行。

If true , only reads may be executed against the storage .