Key Pools and best practices


I'm wondering about what the best practices are around generating and maintaining key pools for a wallet.

What is the maximum number of keys/addresses that can be created for a single wallet? Phrased another way, what is the largest value one can safely put for the keypool option in bitcoin.conf?

If I generate some keys with bitcoind keypoolrefill then generate some new addresses and then call keypoolrefill again, will the original addresses still work, and will my private key now work for all addresses I've ever created?

Is there some way to determine how many keys are left in the current key pool?

The Bitcoin documentation says that this feature is actively being phased out. When will this happen and what will the new system be?

This wallet type is being actively phased out and discouraged from being used due to the backup hassle.

Answers to any of these questions is greatly appreciated.

Gavin Andresen (Bitcoin's Chief...

0 0
0 0
0 0

Introduction to Cisco Unified Computing System

The introduction of the Cisco Unified Computing System

(Cisco UCS

) in June 2009 presented a new model for data center and server management. As of August 2013, Cisco UCS is the #2 x86 blade server, worldwide,


and is used by more than 26,000 unique customers. While the model is no longer new, a growing number of customers are deploying Cisco UCS for the first time. This guide provides an overview of Cisco UCS essentials and best practices. This guide also covers the most direct path to working in a stateless-server SAN boot environment, upon which much of the Cisco UCS core value is based, with respect to service availability. In support of a utility or cloud computing model, this guide also presents a number of concepts and elements within the Cisco UCS Management Model that should help data center operators increase responsiveness and efficiency by improving data center automation.


0 0

Bitcoin-QT with standard settings will keep 100 unused addresses in your wallet at all times. The goal is that backups will be future proof to some extent.

A key pool allows to create backups in bigger intervals

Every time you create a transaction, the remainder of the input balance is sent to a new address in your own wallet. If addresses were generated only then, you would have to create a new backup after each transaction, or be at risk to lose any funds associated with that new address if your wallet got lost. By keeping a pool of unused addresses in store, your backup will be sufficient for the next 100 transactions before you will be at risk of losing something.

To create a bigger key pool, with e.g. 10000 keys, the client can be started with the parameter -keypool=10000.

I don't have intimate knowledge of either multibit or electrum, but suspect that they keep a key pool for the exact same reason.

One vs. many addresses

Using many...

0 0

Hi All,

does anyone have good documentation or information on best practices on webapps and app pools

I read in some sites that now MS recommends a single webapp with multiple host headed site collections.

I feel a little bit uneasy about having a single point of failure if I have My Sites, Portal, Search and collaboration on a single webapp hosted by a single app pool

Also, keep in mind that the farm will host more than 15k users and have 6 WFEs on load balance

I was inclined to have 4 webapps each running separate app pools (portal, my, search, collaboration) + hosted site collection on 2 of them (portal and collaboration)

MS model shows I should have them all in one webapp, should the app pool be affected by the heavy usage of collaboration content? thats one of my concerns, the other is single point of failure on the app pool layer and account. If...

0 0

Best practices to improve performance in JDBC

This topic illustrates the best practices to improve performance in JDBC with the following sections:

Overview of JDBC

JDBC defines how a Java program can communicate with a database. This section focuses mainly on JDBC 2.0 API. JDBC API provides two packages they are java.sql and javax.sql . By using JDBC API, you can connect virtually any database, send SQL queries to the database and process the results.

JDBC architecture defines different layers to work with any database and java, they are JDBC API interfaces and classes which are at top most layer( to work with java ), a driver which is at middle layer (implements the JDBC API interfaces that maps java to database specific language) and a database which is at the bottom (to store physical data). The following figure illustrates the JDBC architecture.

JDBC API provides interfaces and classes to work with databases. Connection interface...

0 0

Best practices for using the keys

Choosing characters

Although the characters (called "features" in the keys) in Features Available are listed in a particular order, it's up to you to choose characters in the order you wish. It's best, however, to choose the simplest or most obvious characters you can easily address first.

It's OK to skip characters

In looking through the characters, you may not understand a character, you may not be sure which state of a character to choose, or a character or state may not be clear on your specimen. It's better to skip the character in such cases. Do not guess!

Also, skip characters that do not apply to your specimen, such as a seed character if your specimen is a fruit. Additionally, skip characters that are not relevant, such as a character that refers to a part on your disseminule that is broken off. This is a common occurrence in some taxa, such as grasses, in which the florets may be damaged.

Use illustrated...
0 0

Use of PKI-based solutions continues to grow – more sites than ever are moving to HTTPS, enterprises are leveraging Digital Certificates as an authentication factor for users and machines, S/MIME is proving its worth as both an email encryption option and a way to validate the source of emails to counter phishing – but the encryption and authentication underlying these applications can be completely undermined if proper key management isn’t enforced.

Every time a Digital Certificate is issued, whether from a CA or self-signed, a private/public key pair must be generated. Best practice indicates that your private key(s) should remain secure and, well…private! Should anyone get a hold of it, depending on the certificate type, they could create phishing websites with your organization’s certificate in the address bar, authenticate to corporate networks by impersonating you, sign applications or documents in your name, or read your encrypted emails.

In many cases, your...

0 0

Building a recruitment strategy that can meet the ups and downs of everyday business in a volatile economy is a tough challenge. Ironically, the high rate of unemployment does not mean that the skills, education, and experience that your company needs are readily available.

To compound matters, you are not alone in your quest for the best employees. Even companies who are not currently hiring are actively building their talent communities and their candidate pools in preparation for the possibility of future growth.

What Is Your Recruitment Strategy?

It is critical to understand your organization before seeking to add employees. In order to develop a comprehensive recruitment strategy, your company should explore the following:

Does the organization have a current recruitment strategy? Is everyone familiar with it? Is it working or does it need to change? What are the industry trends, and more specifically, what are the organization’s competitors doing in...
0 0