High Availability (HA) describes systems that are dependable enough to operate continuously without failing. They are well-tested and sometimes equipped with redundant components. High availability refers to those systems that offer a high level of operational performance and quality over a relevant time period.
Availability measures the ability of a piece of equipment to be operated if needed, while reliability measures the ability of a piece of equipment to perform its intended function for a specific interval without failure.
Availability refers to system uptime, i.e. the storage system is operational and can deliver data upon request. Durability, on the other hand, refers to long-term data protection, i.e. the stored data does not suffer from bit rot, degradation or other corruption.
Companies aiming for high availability (HA) talk about four nines (less than an hour of downtime a year), which is what we strived for during my time at Netflix. Five nines availability, which means only five minutes of downtime per year, is ambitious.
Percentage calculation
| Availability % | Downtime per year | Downtime per month |
|---|
| 99.9% ("three nines") | 8.77 hours | 43.83 minutes |
| 99.95% ("three and a half nines") | 4.38 hours | 21.92 minutes |
| 99.99% ("four nines") | 52.60 minutes | 4.38 minutes |
| 99.995% ("four and a half nines") | 26.30 minutes | 2.19 minutes |
The accepted availability standard for emergency response systems is 99.999% or “five nines” – or about five minutes and 15 seconds of downtime per year (see table below). To achieve five nines, all components of the system must work seamlessly together.
As you can see from the table, if the reliability is held constant, even at a high value, this does not directly imply a high availability. As the time to repair increases, the availability decreases. Even a system with a low reliability could have a high availability if the time to repair is short.
Where does it come from? Some of the data seems pretty private. They just came in to do their sales presentation. They said they have a team of analysts who basically call all the brokers for information, they come in to the buildings to read directories or use your building websites to see who you tenants are.
COSTAR
| Acronym | Definition |
|---|
| COSTAR | Corrective Optics Space Telescope Axial Replacement |
| COSTAR | Computer Stored Ambulatory Record |
| COSTAR | Combat Service to The Army |
| COSTAR | Covert Submarine Transmit & Receive |
CoStar Group's global database includes approximately 119 billion square feet of coverage in 5.4 million properties. All rental rates reported in the CoStar Retail Report are calculated using Triple Net (NNN) rental rates.
That being said, the basic packages like one for Los Angeles will run you about $1,000 a month. You need to tack on the lease and sales comps to make CoStar truly useful which is about another $850 a month.
Why are multi-tenant properties attractive to investors? They are usually leased, providing leasing income.
A raw space is minimally finished with four walls and a door. To complete the raw space is commonly known as a “build-out”. DEFINITION of 'Shell Lease' A “shell lease” is when a tenant rents an unfinished interior space and completes the construction.
What kind of industrial operation is most likely to find a high, hangar-like metal building suitable? qualified labor pools.
Here's the simple formula for Net Effective Rent: It is the annual cost of rent minus the concessions divided by the number of months of the lease.
Rentable square feet is defined as the usable square feet plus a portion of the building's common space. Common spaces are areas usable by all tenants in the building and include, but are not limited to, hallways, lobbies, public restrooms and fitness facilities.
The three most common types of leases are gross leases, net leases, and modified gross leases.
- The Gross Lease. The gross lease tends to favor the tenant.
- The Net Lease. The net lease, however, tends to favor the landlord.
- The Modified Gross Lease.
In a gross lease, the landlord pays any and all of the additional expenses associated with owning, maintaining and using the property. These additional costs typically include expenses such as tax, insurance, utilities and maintenance repairs.
In a triple net lease (also referred to as a “NNN” lease), the tenant pays all expenses associated with the property. This includes real estate taxes, building insurance, maintenance (including structural repairs), rent, and utilities.
A triple net lease (triple-Net or NNN) is a lease agreement on a property whereby the tenant or lessee promises to pay all the expenses of the property including real estate taxes, building insurance, and maintenance.
What exactly does a Base Year Stop mean? The LeaseMatrix Commercial Leasing Glossary defines a Base Year Stop as: The annualized amount per rentable square foot that a landlord pays toward the operating expenses of a building. Expense stops are often set following the first year of the lease (i.e. the “Base Year”).
A full service lease, sometimes called a gross lease, is defined as a lease structure where the landlord is responsible for paying all operating expenses for the property.
0. A character property is a property/house that has some character about it - this means it has something interesting about it, rather than a typical property. E.g. A house with an interesting fireplace or staircase etc.
A triple net (NNN) lease is defined as a lease structure where the tenant is responsible for paying all operating expenses associated with a property. The triple net or NNN lease is considered a “turnkey” investment since the landlord is not responsible for paying any operating expenses.
As nouns the difference between rent and occupancyis that rent is a payment made by a tenant at intervals in order to occupy a property or rent can be a tear or rip in some surface while occupancy is the act of occupying, the state of being occupied or the state of being an occupant or tenant.
Effective Rent is the actual rental rate to be achieved by the landlord after deducting the value of concessions from the base rental rate that are paid or given to the tenant (such as a build out or renovation allowance, free rent, moving allowance, etc.), and is usually expressed as an average lease rate over the
Related Content. The rent payable at a particular point in time. The phrase is often used in alienation covenants where a tenant covenants not to grant an underlease at a rent less than the rent passing under the headlease (or the relevant proportion of it in the case of an underlease of part).
Actual rent is the price per month of your lease before the concessions are applied. This is the list price of your apartment and is often referred to as the “market rent.”
FACE RENT: The quoted base rental rate before taking into account any rent increases or incentives. GROSS RENT: The rent calculated inclusive of all building costs (i.e., property insurance, taxes, common area maintenance expenses, etc.) NET RENT: The rent calculated excluding building costs.
by Practical Law Property. A clause providing for changes to the rent payable, to reflect the market value of the premises. Any provisions dealing with the review of rent should be considered carefully and, if necessary, a surveyor with appropriate experience should review the proposed wording.
Occupancy Costs, or the total of all expenses the tenant pays for their retail space, is usually displayed as a ratio to sales. The formula Annual Gross Rent divided by Annual Sales = Occupancy Cost (as a %) is easy to calculate.
