Random Redundant Storage in Disk Arrays: Complexity of Retrieval Problems

نویسندگان

  • Joep Aerts
  • Jan H. M. Korst
  • Frits C. R. Spieksma
  • Wim F. J. Verhaegh
  • Gerhard J. Woeginger
چکیده

Random redundant data storage strategies have proven to be a good choice for efficient data storage in multimedia servers. These strategies lead to a retrieval problem in which it is decided for each requested data block which disk to use for its retrieval. In this paper, we give a complexity classification of retrieval problems for random redundant storage.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Random duplicate storage strategies for load balancing in multimedia servers

An important issue in multimedia servers is disk load balancing. In this paper we use randomization and data redundancy to enable good load balancing. We focus on duplicate storage strategies, i.e., each data block is stored twice. This means that a request for a block can be serviced by two disks. A consequence of such a storage strategy is that we have to decide for each block which disk to u...

متن کامل

Backward Error Recovery in Redundant Disk Arrays

Redundant disk arrays are single fault tolerant, incorporating a layer of error handling not found in nonredundant disk systems. Recovery from these errors is complex, due in part to the large number of erroneous states the system may reach. The established approach to error recovery in disk systems is to transition directly from an erroneous state to completion. This technique, known as forwar...

متن کامل

Challenges for Tertiary Storage in Multimedia Servers

The low cost per megabyte of optical disk and magnetic tape storage make these technologies particularly attractive for use in large capacity storage servers, including multimedia servers. However, these devices have performance problems that range from high costs for many optical drives to low performance and lack of random access in tape drives. We evaluate the performance on multimedia appli...

متن کامل

Airdisks and Airraid: Modeling and Scheduling Periodic Wireless Data Broadcast (extended Abstract) 1 Address Correspondence To

We introduce a simple model, called the airdisk, for modeling the access of data transmitted periodically over wireless media as being analogous to the access of data from a standard magnetic disk. We consider several issues related to airdisks, such as their mean rotational latency under certain assumptions. The problem of scheduling the order in which data items are broadcast is analogous to ...

متن کامل

Database Recovery Using Redundant Disk Arrays

Redundant disk arrays provide a way for achieving rapid recovery from media failures with a relatively low storage cost for large scale database systems requiring high availability. In this paper we propose a method for using redundant disk arrays to support rapid recovery from system crashes and transaction aborts in addition to their role in providing media failure recovery. A twin page schem...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • IEEE Trans. Computers

دوره 52  شماره 

صفحات  -

تاریخ انتشار 2003